{"product_id":"edelbrock-cylinder-head-sbc-performer-rpm-64cc-straight-spark-plug-for","title":"Edelbrock Cylinder Head SBC Performer RPM 64cc Straight Spark Plug for","description":"Cylinder Head Specifications: Combustion chamber volume: 65cc \/ 70cc; Intake runner volume: 185cc \u0026amp; 195cc; Exhaust runner volume: 65cc; Intake valve diameter: 2.02\"; Exhaust valve diameter: 1.60\"; Valve stem diameter: 11\/32\"; Valve guides: Maganese Bronze; Deck thickness: 9\/16\"; Valve spring diameter: 1.46\"; Valve spring maximum lift: .575\"; Rocker stud: 3\/8\"; Guideplate: Hardened steel; Pushrod diameter: 5\/16\"; Valve angle: 23°; Exhaust port location: Stock; Spark plug fitment: 14mm x .750 reach, gasket seat. * Performer RPM Cylinder Heads have all of the same great features as our Performer series heads, but are available with straight or angled spark plug configuration to fit a variety of exhaust applications. Available with a polished finish for a show quality look!  **  Match with Edelbrock head gasket sets. Bare heads will have valve guides and seats installed, but will require final sizing and a valve job to match the valves you will be using. To use stock rockers on small-block Chevy heads, .100\" longer than stock pushrods are required. Edelbrock pushrods #9629 are recommended. Use Head Bolt Kits for easy installation. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3\/4\" reach with flat gasket seat. S\/B Chevy heads may not be used on engines with less than 4\" bore (262, 265, 283, 305, 307 c.i.d.) except with cams having less than .450\" valve lift.","brand":"Edelbrock","offers":[{"title":"Default Title","offer_id":40597440331955,"sku":"EDE60895","price":1252.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/3758\/1491\/products\/970e8a5516b27982121a938f304ef8f3.jpg?v=1631979997","url":"https:\/\/hellhoundperformance.store\/products\/edelbrock-cylinder-head-sbc-performer-rpm-64cc-straight-spark-plug-for","provider":"Hellhound Performance","version":"1.0","type":"link"}