{"product_id":"edelbrock-cyl-head-perf-rpm-bbc-rect-port-nhra-legal-bare","title":"Edelbrock Cyl Head Perf RPM BBC Rect Port Nhra Legal Bare","description":"Cylinder Head Specifications: Combustion chamber volume: 118cc; Intake runner volume: 315cc; Exhaust runner volume: 110cc; Intake valve diameter: 2.19\"; Exhaust valve diameter: 1.88\"; Valve stem diameter: 11\/32\"; Valve guides: Manganese bronze; Deck thickness: 9\/16\"; Valve spring diameter: 1.55\"; Valve spring maximum lift: .700\"; Rocker stud: 7\/16\"; Guideplate: Hardened steel; Pushrod diameter: 3\/8\"; Valve angle: 26°; Exhaust port location: Stock; Spark plug fitment: 14mm x 3\/4 reach, gasket seat.  INSTALLATION NOTE: Bare heads will have valve guides \u0026amp; seats installed, but will require final sizing \u0026amp; a valve job to match the valves you will be using. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3\/4\" reach with flat gasket seat. All Performer and Performer RPM Big-Block Chevy heads: Spark plug is closer to center of bore, will interfere with high-dome pistons for open chamber heads. Use pistons designed for our heads. Match with Edelbrock head gasket sets.\u003cbr\u003e\u003ca href=\"https:\/\/d32vzsop7y1h3k.cloudfront.net\/a94f98a6cca627bead20d256b78521ca.PDF\"\u003eWarranty\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"https:\/\/d32vzsop7y1h3k.cloudfront.net\/bb3cf21a560d615556180e7d68cb097b.PDF\"\u003eInstallation Instructions\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"https:\/\/d32vzsop7y1h3k.cloudfront.net\/e3a99c758b53bf2c50510a680f1ba60a.PDF\"\u003eInstallation Instructions\u003c\/a\u003e\u003cbr\u003e","brand":"Edelbrock","offers":[{"title":"Default Title","offer_id":48762787594546,"sku":"EDE60547","price":855.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0875\/7365\/9954\/files\/280a8c7cf28492124616ec5afd2c2290.jpg?v=1716891060","url":"https:\/\/peterscarparts.com\/products\/edelbrock-cyl-head-perf-rpm-bbc-rect-port-nhra-legal-bare","provider":"PETER'S CAR PARTS","version":"1.0","type":"link"}