{"title":"Engine \u0026 Valvetrain","description":"","products":[{"product_id":"tsp-stage-1-cathedral-camshaft-224r","title":"TSP Stage 1 Cathedral Camshaft - 224R","description":"\u003cp class=\"MsoNormal\"\u003e\u003cspan\u003e\u003cstrong\u003eTSP Cathedral Heads Stage 1 Cam Specs: \u003c\/strong\u003e224\/224 .600\/.600 112LSA or 114LSA\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan\u003eThe Stage 1 camshafts use lobes that are designed to be both beehive \u0026amp; double valve spring friendly. The Stage 1 camshaft is available in a wide variety of lobe separations. The most popular options customers select is either the 112LSA or the wider 114LSA. The 112LSA helps to bring the camshafts powerband lower in the rpm band. The lower LSA also creates a slightly rougher idle. The Stage 1 camshaft is without a doubt one of the most popular camshafts we offer for the LS1 engines. It has awesome drivability while making a solid 40+ rear wheel horsepower gains!  For customers looking for a smaller camshaft that packs a big punch, the Stage 1 camshaft is pretty hard to beat!\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cul type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\"\u003e\u003cspan\u003e\u003cstrong\u003eEngines best suited for:\u003c\/strong\u003e Cathedral Heads - LS1, LS2, \u0026amp; LS6 \u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\u003cspan\u003e\u003cstrong\u003eDesired Compression ratio for cam\u003c\/strong\u003e: 9.5:1+\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\u003cspan\u003e\u003cstrong\u003eRecommended Springs Required\u003c\/strong\u003e: PAC 1219 or TSP\/PAC Dual .660 Valve Springs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\u003cspan\u003e\u003cstrong\u003eAftermarket Stall Converter Required\u003c\/strong\u003e: On a 114LSA it will work with the stock torque converter. The 112LSA could benefit from 2600+ stall converter.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\u003cspan\u003e\u003cstrong\u003eUpgraded Rear Gear Required:\u003c\/strong\u003e No\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\u003cspan\u003e\u003cstrong\u003eOperating RPM Range\u003c\/strong\u003e: 1400-6500\u003c\/span\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\n\u003cspan\u003e\u003cstrong\u003eEstimated Power Increase\u003c\/strong\u003e: 45-50+\u003c\/span\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli class=\"MsoNormal\"\u003e\u003cspan\u003e\u003cstrong\u003eDrivability:\u003c\/strong\u003e Great driveability, has great stock like manners with good lope at idle and makes great power! Custom Tuning required.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Texas Speed and Performance","offers":[{"title":"112","offer_id":49091903291714,"sku":"TSP-224R6","price":350.99,"currency_code":"USD","in_stock":true},{"title":"114","offer_id":49091903324482,"sku":"TSP-224R7","price":350.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0829\/6621\/7026\/files\/TSP224R.png?v=1718764590"},{"product_id":"tsp-660-polished-dual-spring-kit-w-pac-valve-springs-titanium-retainers-prc-integrated-seat-seal","title":"TSP .660\" Polished Dual Spring Kit w\/ PAC Valve Springs, Titanium Retainers, \u0026 PRC Integrated Seat\/Seal","description":"\u003cp\u003e\u003cspan\u003eAnthony's Performance Parts is proud to offer the latest version of the best dual valve spring kit on the market from Texas Speed and Performance!  This kit now includes our patent-pending Precision Race Components integrated seat and seal.  You no longer have to worry about special installation tools for your valve seals, tearing a valve seal upon installation, or valve seals popping off!  Our new integrated seat and seal will work with factory-size valve guides and CANNOT be used on any aftermarket bronze guide applications!\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eThe polished TSP .660\" spring kit featuring PAC valve springs is the newest offering in valve spring technology offering the latest processes and material for maximum spring life.  PAC Racing is a leader in valve spring technology, so it was only natural to team up with the best in the valve spring industry for our latest offering in a valve spring kit!  We have developed a .660\" dual spring kit with the help of PAC Racing that still offers excellent valvetrain control, even for the more aggressive hydraulic roller camshafts.  These valve springs will offer excellent durability and stability and will work well with factory-style lifters.  PAC polishes the valve springs, which helps to increase the overall life of the springs.  This greatly reduces the chances of spring fatigue and failure.  PAC's polishing process is completed without losing any pressure in the valve springs, so you maintain all of the capabilities of the non-polished version.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eKit includes the following items:\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmerican-Made\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePAC Racing Polished Dual Valve Springs Rated to .660\" Lift\u003c\/li\u003e\n\u003cli\u003ePatent-Pending Precision Race Components Integrated Seat\/Seal for Dual Valve Springs\u003c\/li\u003e\n\u003cli\u003eTitanium Retainers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cbr\u003e*The dual valve spring kit utilizes GM factory valve stem locks, which are not included\u003cbr\u003e*Will not work on LS7, LS9, any Gen 5 LT1\/4 engine applications, and most aftermarket cylinder heads with bronze guides\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003eSpecs:\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eInstall Height:   1.810\"\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eClosed Spring Pressure: 160 lb. @ 1.810\" Installed Height\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eOpen Spring Pressure:  415 lb. @ .660\" lift\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eMaximum Spring Lift: .660\"\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eCoil Bind 1.015\"\u003c\/span\u003e\u003c\/p\u003e\n\u003c!----\u003e","brand":"Texas Speed and Performance","offers":[{"title":"Default Title","offer_id":49092170121538,"sku":"PRC-TSPPACPOL660SPRINGKIT","price":313.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0829\/6621\/7026\/files\/TSP.660ValveSpringsandSeats.png?v=1718765196"},{"product_id":"edelbrock-oldsmobile-400-455-c-i-performer-rpm-cylinder-heads-assembled-hydraulic-roller","title":"Edelbrock Oldsmobile 400-455 c.i. Performer RPM Cylinder Heads, Assembled, Hydraulic Roller","description":"\u003cdiv class=\"attribute-container flex-container flex-wrap\"\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eEdelbrock\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eManufacturer's Part Number:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e\n\u003cdiv class=\"beatAPrice\"\u003e61025\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003ePart Type:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eCylinder Heads\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eProduct Line:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eEdelbrock Performer RPM Cylinder Heads\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eUPC:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e00085347610259\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCombustion Chamber Volume (cc):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e77\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Runner Volume (cc):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e218cc\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eExhaust Runner Volume (cc):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e128cc\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCylinder Head Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eAssembled\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCylinder Head Material:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eCast aluminum\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Port Shape:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eRectangular\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Valve Diameter (in.):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e2.150 in.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCNC-Machined Combustion Chamber:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCNC-Machined Intake Runner:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCNC-Machined Exhaust Runner:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCombustion Chamber Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eHeart\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Port Location:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eStandard\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eExhaust Port Shape:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eSquare\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eExhaust Port Location:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eStandard\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Valves Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eExhaust Valves Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eExhaust Valve Diameter (in.):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e1.680 in.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Springs Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eMaximum Valve Lift (in.):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e0.600 in.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCamshaft Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eHydraulic roller\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eOutside Diameter of Outer Spring (in.):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e1.460 in.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eDamper Spring Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eNumber of Springs Per Valve:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eDual\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRetainers Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRetainer Material:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eSteel\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eLocks Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eLock Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e7 degree\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Stem Seals Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Stem Seal Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003ePositive stop\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRocker Arm Studs Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRocker Arm Nut Thread Size:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e7\/16 in.-20\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRocker Arms Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRocker Arm Nuts Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eGuideplates Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eGuideplate Pushrod Size:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e3\/8 in.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Cover Mounting Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003ePerimeter bolt\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eAccessory Bolt Holes Drilled:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Valve Angle:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e6\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Guides Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Guide Material:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eManganese bronze\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Seats Machined:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Seat Machine Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e3-angle\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Seat Material:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eDuctile iron\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCylinder Head Color:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNatural\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eSteam Holes Drilled:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eOiling Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eThrough pushrod\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eMachined for O-Ring:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eHeat Crossover:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRemanufactured:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eQuantity:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eSold individually.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eSpecial Attention:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eFor use with hydraulic roller camshafts. Recommended for applications with a minimum of 4.125 in. bore spacing\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"part-detail-description-title\"\u003e\u003cstrong\u003eEdelbrock Performer RPM Cylinder Heads\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"part-detail-description\"\u003eEdelbrock Performer RPM aluminum cylinder heads feature threaded inserts in the rocker studs and exhaust manifold bolt holes for superior strength and durability. They also include hardened seats, bronze valve guides, and fully machined valve cover rails for a more consistent gasket seal. These heads offer improved power throughout the RPM range for greater throttle response and top-end horsepower. Countless options are available; order the model recommended for your vehicle and engine application.\u003c\/p\u003e\n\u003c!----\u003e","brand":"Atech Motorsports","offers":[{"title":"Default Title","offer_id":49262566080834,"sku":"EDL61025","price":1223.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0829\/6621\/7026\/files\/EDL61025_1.jpg?v=1720325936"},{"product_id":"edelbrock-oldsmobile-400-455-c-i-performer-rpm-cylinder-heads-assembled-flat-tappet","title":"Edelbrock Oldsmobile 400-455 c.i. Performer RPM Cylinder Heads, Assembled, Flat Tappet","description":"\u003cdiv class=\"attribute-container flex-container flex-wrap\"\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eEdelbrock\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eManufacturer's Part Number:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e\n\u003cdiv class=\"beatAPrice\"\u003e61029\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003ePart Type:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eCylinder Heads\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eProduct Line:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eEdelbrock Performer RPM Cylinder Heads\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eUPC:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e085347610297\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCombustion Chamber Volume (cc):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e77\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Runner Volume (cc):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e218cc\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eExhaust Runner Volume (cc):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e128cc\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCylinder Head Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eAssembled\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCylinder Head Material:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eCast aluminum\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Port Shape:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eRectangular\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Valve Diameter (in.):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e2.150 in.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCNC-Machined Combustion Chamber:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCNC-Machined Intake Runner:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCNC-Machined Exhaust Runner:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCombustion Chamber Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eHeart\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Port Location:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eStandard\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eExhaust Port Shape:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eSquare\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eExhaust Port Location:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eStandard\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Valves Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eExhaust Valves Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eExhaust Valve Diameter (in.):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e1.680 in.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Springs Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eMaximum Valve Lift (in.):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e0.600 in.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCamshaft Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eHydraulic flat tappet\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eOutside Diameter of Outer Spring (in.):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e1.460 in.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eDamper Spring Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eNumber of Springs Per Valve:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eSingle\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRetainers Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRetainer Material:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eSteel\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eLocks Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eLock Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e7 degree\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Stem Seals Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Stem Seal Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003ePositive stop\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRocker Arm Studs Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRocker Arm Nut Thread Size:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e7\/16 in.-20\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRocker Arms Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRocker Arm Nuts Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eGuideplates Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eGuideplate Pushrod Size:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e3\/8 in.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Cover Mounting Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003ePerimeter bolt\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eAccessory Bolt Holes Drilled:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Valve Angle:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e6\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Guides Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Guide Material:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eManganese bronze\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Seats Machined:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Seat Machine Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e3-angle\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Seat Material:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eDuctile iron\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCylinder Head Color:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNatural\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eSteam Holes Drilled:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eOiling Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eThrough pushrod\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eMachined for O-Ring:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eHeat Crossover:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRemanufactured:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eQuantity:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eSold individually.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eSpecial Attention:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eFor use with hydraulic flat tappet camshafts. Recommended for applications with a minimum of 4.125 in. bore spacing\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"part-detail-description-title\"\u003e\u003cstrong\u003eEdelbrock Performer RPM Cylinder Heads\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"part-detail-description\"\u003eEdelbrock Performer RPM aluminum cylinder heads feature threaded inserts in the rocker studs and exhaust manifold bolt holes for superior strength and durability. They also include hardened seats, bronze valve guides, and fully machined valve cover rails for a more consistent gasket seal. These heads offer improved power throughout the RPM range for greater throttle response and top-end horsepower. Countless options are available; order the model recommended for your vehicle and engine application.\u003c\/p\u003e\n\u003c!----\u003e","brand":"Atech Motorsports","offers":[{"title":"Default Title","offer_id":49262576337218,"sku":"EDL61029","price":1191.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0829\/6621\/7026\/files\/EDL61025_1.jpg?v=1720325936"},{"product_id":"edelbrock-performer-pontiac-389-455-cylinder-head-assembled-hydraulic-roller","title":"Edelbrock Performer Pontiac 389-455 Cylinder Head, Assembled Hydraulic Roller","description":"\u003cdiv class=\"attribute-container flex-container flex-wrap\"\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eEdelbrock\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eManufacturer's Part Number:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e\n\u003cdiv class=\"beatAPrice\"\u003e60575\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003ePart Type:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eCylinder Heads\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eProduct Line:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e\u003ca href=\"https:\/\/www.atechmotorsports.com\/search\/part-type\/cylinder-heads\/product-line\/edelbrock-performer-cylinder-heads\" class=\"color-link\"\u003eEdelbrock Performer Cylinder Heads\u003c\/a\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eSummit Racing Part Number:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e\n\u003cdiv class=\"beatAPrice\"\u003eEDL-60575\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eUPC:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e085347605750\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCombustion Chamber Volume (cc):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e87\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Runner Volume (cc):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e215cc\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eExhaust Runner Volume (cc):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e175cc\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCylinder Head Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eAssembled\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCylinder Head Material:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eCast aluminum\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Valve Diameter (in.):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e2.110 in.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCNC-Machined Combustion Chamber:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCNC-Machined Intake Runner:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCNC-Machined Exhaust Runner:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Port Location:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eStandard\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eExhaust Port Shape:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eRam Air IV\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eExhaust Port Location:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eStandard\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Valves Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eExhaust Valves Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eExhaust Valve Diameter (in.):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e1.660 in.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Springs Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eMaximum Valve Lift (in.):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e0.575 in.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCamshaft Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eHydraulic roller\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eOutside Diameter of Outer Spring (in.):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e1.460 in.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eDamper Spring Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eNumber of Springs Per Valve:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eDual\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRetainers Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRetainer Material:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eSteel\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eLocks Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eLock Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e7 degree\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Stem Seals Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Stem Seal Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003ePositive stop\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRocker Arm Studs Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRocker Arm Nut Thread Size:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e7\/16 in.-20\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRocker Arms Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRocker Arm Nuts Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eGuideplates Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eGuideplate Pushrod Size:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e5\/16 in.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Cover Mounting Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003ePerimeter bolt\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eAccessory Bolt Holes Drilled:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eIntake Valve Angle:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e14\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Guides Included:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Guide Material:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eManganese bronze\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Seats Machined:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Seat Machine Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e3-angle\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eValve Seat Material:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eDuctile iron\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCylinder Head Color:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNatural\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eSteam Holes Drilled:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eOiling Style:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eThrough pushrod\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eMachined for O-Ring:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eHeat Crossover:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eYes\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eRemanufactured:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eNo\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eQuantity:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eSold individually.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eThese heads require Ram Air IV (round port) style exhaust manifolds or headers and Edelbrock head bolt kit 8549.\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eCARB EO Number(s):\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003e\n\u003cul class=\"part-detail-attribute-list\"\u003e\n\u003cli\u003e\u003cspan\u003e\u003ca href=\"http:\/\/arb.ca.gov\/msprog\/aftermkt\/devices\/eo\/d-215-94.pdf\" class=\"color-link\" target=\"_blank\"\u003eD-215-94\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-9 large-6\"\u003e\u003cstrong\u003eEmissions:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"small-12 medium-15 large-18\"\u003eCalifornia EO Approved\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"part-detail-description-title\"\u003e\u003cstrong\u003eEdelbrock Performer Cylinder Heads\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"part-detail-description\"\u003eAll Edelbrock aluminum cylinder heads feature threaded inserts in the rocker studs and exhaust manifold bolt holes for superior strength and durability. They also include hardened seats, bronze valve guides, and fully machined valve cover rails for a more consistent gasket seal. They offer improved power throughout the rpm range for greater throttle response and top-end horsepower. The intake and exhaust runners are CNC-machine profiled for superior flow and performance.\u003c\/p\u003e","brand":"Atech Motorsports","offers":[{"title":"Default Title","offer_id":49688453316930,"sku":"EDL-60575","price":1338.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0829\/6621\/7026\/files\/edl-60575_qq_xl.jpg?v=1724789914"}],"url":"https:\/\/anthonysperformanceparts.com\/collections\/engine-valvetrain.oembed","provider":"Anthony's Performance Parts","version":"1.0","type":"link"}