{"product_id":"cylinder-head-edelbrock-60575","title":"Cylinder Head Edelbrock 60575","description":"\u003cp\u003eSpecifications for the cylinder head include: combustion chamber volume of 87cc; intake runner volume of 215cc; exhaust runner volume of 175cc; intake valve diameter of 2.\u003c\/p\u003e\u003cp\u003e11\"; exhaust valve diameter of 1.\u003c\/p\u003e\u003cp\u003e66\"; valve stem diameter of 11\/32\"; valve guides made of manganese bronze; deck thickness of 5\/8\"; valve spring diameter of 1.\u003c\/p\u003e\u003cp\u003e46\"; maximum lift for valve spring is .\u003c\/p\u003e\u003cp\u003e575\"; rocker stud measures 7\/16\"; guide plate is made of hardened steel; pushrod diameter is 5\/16\"; valve angle is 14°; exhaust port location is stock Ram Air IV; spark plug fitment is 14mm x 3\/4 reach, gasket seat.\u003c\/p\u003e\u003cp\u003eDesigned for performance gains in 1962-79 389-455 c.\u003c\/p\u003e\u003cp\u003eI.\u003c\/p\u003e\u003cp\u003ed.\u003c\/p\u003e\u003cp\u003ePontiac engines, these cylinder heads are patterned after the 1969-70 Ram Air IV Pontiac cylinder head.\u003c\/p\u003e\u003cp\u003ePerformer heads #60579\/#60575 are emissions legal for 1965-79 vehicles in all 50 states.\u003c\/p\u003e\u003cp\u003eThey feature combustion chambers of 87cc designed to maximize performance while using low-octane fuel with a streetable 9.\u003c\/p\u003e\u003cp\u003e5: 1 compression ratio.\u003c\/p\u003e\u003cp\u003ePerformer RPM heads with 72cc combustion chambers are for higher compression engines.\u003c\/p\u003e\u003cp\u003ePerformer RPM #60509 is semi-machined and requires finishing by a professional cylinder head porter.\u003c\/p\u003e\u003cp\u003eThey include installed valve guides and seats with no intake pushrod holes.\u003c\/p\u003e\u003cp\u003ePerformer RPM #60587 is not port matched or bowl blended and is NHRA accepted for Stock \u0026amp; Super Stock.\u003c\/p\u003e\u003cp\u003eINSTALLATION NOTE: These heads require Ram Air IV (round port) style exhaust manifolds or headers and Edelbrock head bolt kit #8549.\u003c\/p\u003e\u003cp\u003eDeck thickness is 5\/8\", rocker stud diameter is 7\/16\", and pushrod diameter is 5\/16\" (width of slot in guide plate).\u003c\/p\u003e","brand":"Edelbrock","offers":[{"title":"Default Title","offer_id":51725390971162,"sku":"EDL60575","price":1575.54,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0975\/8942\/8506\/files\/61v6DEkQaaL_a17d8cc8-d99a-4cfc-842c-f51ab929bf6d.jpg?v=1771656644","url":"https:\/\/trybeepbeep.com\/products\/cylinder-head-edelbrock-60575","provider":"TryBeepbeep","version":"1.0","type":"link"}