{"product_id":"engine-cylinder-head-145","title":"Engine Cylinder Head","description":"The Edelbrock #60975 E-Tec cylinder head is replacements for 302, 327, 350 \u0026amp; 400 c.i.d. S\/B Chevy engines with \"Vortec-style\" manifolds. They feature an LT1-style raised runner intake port design for increased air-flow and ultimate performance. A unique combustion chamber design positions the spark plug closer to the center of the cylinder, promoting a more efficient combustion resulting in more power. This cylinder head includes an adjustable rocker stud and guide plate set-up for use with adjustable rockers or washers to properly position the stud height to accommodate factory style self-aligning rocker arms. They have 20% more exhaust flow than a cast iron Vortec head, great performance up to 6000 rpm and can produce 9.5:1 compression with stock pistons in 350 cubic-inch engines. RPM E-Tec head is dual-drilled and will accept 1987-95 center bolt and\/or 1986 \u0026amp; prior perimeter flange mount valve covers and most stock exhaust manifolds. E-Tec 170 head is 50-state street legal.","brand":"Edelbrock","offers":[{"title":"Default Title","offer_id":52988033925414,"sku":"BDVJ_60975","price":1124.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0672\/5697\/5654\/files\/fde7f1035d448.jpg?v=1775518669","url":"https:\/\/ossparts.com\/products\/engine-cylinder-head-145","provider":"Operational Speed Supply","version":"1.0","type":"link"}