{"product_id":"edelbrock-single-performer-rpm-olds-head-comp-60519","title":"Edelbrock Single Performer RPM Olds Head Comp 60519","description":"\u003cp\u003eEDE Performer RPM Cyl Head\u003c\/p\u003e\u003cp\u003eEngine Cylinder Head\u003c\/p\u003e\u003cp\u003eOldsmobile:Big-Block:400 (6.6L)\/425 (7.0L)\/455 (7.5L)\u003c\/p\u003e\u003cp\u003eCylinder Head Specifications: Combustion chamber volume: 77cc; Intake runner volume: 188cc; Exhaust runner volume: 106cc; Intake valve diameter: 2.072\"; Exhaust valve diameter: 1.68\"; Valve stem diameter: 11\/32\"; Valve guides: Manganese bronze; Deck thickness: 5\/8\"; Valve spring diameter: 1.46\"; Valve spring maximum lift: .575\"; Rocker stud: 7\/16\"; Guideplate: Hardended steel; Pushrod diameter: 3\/8\"; Valve angle: 6°; Exhaust port location: Stock; Spark plug fitment: 14mm x 3\/4 reach, gasket seat. INSTALLATION NOTE: Head bolt holes drilled for stock 7\/16\" bolts, but can be easily modified for 1\/2\" bolts or studs by drilling the 1\/2\" counter bore. Aftermarket 7\/16\"-stud rocker arms and 3\/8\" hardened pushrods required. Will fit 350-403 Olds with Edelbrock manifold #7111 only (port matching required). Match with Edelbrock head gasket sets. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3\/4\" reach with flat gasket seat. Deck thickness: 5\/8\", rocker stud diameter: 7\/16\", pushrod diameter: 3\/8\" (width of slot in guide plate). Designed for high-performance non-emission 1965-76 Olds 400, 425 and 455 c.i.d. V8's. eart shaped chamber for a more efficient burn, outstanding horsepower and torque. Valvetrain has been upgraded from the factory pedestal-mount system to a 7\/16\" screw-in stud and 3\/8\" pushrod-slot guideplate for increased valvetrain stability. 60517 is not port matched or bowl blended and is NHRA-accepted for Super Stock (except 1968-1969 W-30) only. Deck thickness: 5\/8\", rocker stud diameter: 7\/16\", pushrod diameter: 3\/8\" (width of slot in guide plate). Head bolt holes drilled for stock 7\/16\" bolts, but can be easily modified for 1\/2\" bolts or studs by drilling the 1\/2\" counter bore. Aftermarket 7\/16\"-stud rocker arms and 3\/8\" hardened pushrods required. Replacement valve part numbers are for sets of 8.\u003c\/p\u003e\u003cp\u003eEdelbrock Single Performer RPM Olds Head Comp.\u003c\/p\u003e","brand":"FR SPORT","offers":[{"title":"Default Title","offer_id":67921737023582,"sku":"04NTJ","price":1095.6,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0232\/4721\/files\/36437ca04bb847813c18ef086e00e0db.jpg?v=1793749435","url":"https:\/\/slrspeed.com\/products\/edelbrock-single-performer-rpm-olds-head-comp-60519","provider":"SLRspeed","version":"1.0","type":"link"}