{"product_id":"performer-rpm-rectangle-port-cylinder-head","title":"Performer RPM Rectangle Port Cylinder Head","description":"The Edelbrock #60555 Performer RPM Rectangle Port cylinder head is engineered for Big-Block Chevy applications, offering a significant upgrade for street performance, daily drivers, street rods, and muscle cars seeking enhanced responsiveness and power.\n\nOptimized for a broad operating range, the #60555 head delivers exceptional throttle response and power from 2500 to 7000 rpm. It comes complete with the highest quality intake and exhaust valves, along with matching valve springs, ensuring reliability and performance. The Performer RPM series features include hardened steel guide plates and are designed for hydraulic roller camshafts, with suggested push rod and rocker stud diameters of 0.4375 inches.\n\nKey specifications include a 2.19-inch intake valve diameter, 315 cc intake runner volume, and a 1.55-inch valve spring diameter capable of supporting up to 0.700 inches of maximum lift. The valve angle is set at 26 degrees. This product is intended for use on pre-pollution controlled vehicles only.","brand":"Edelbrock","offers":[{"title":"Default Title","offer_id":52687924232504,"sku":"EDE60555","price":1277.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/664706863.webp?v=1784887545","url":"https:\/\/store.motormia.co\/products\/performer-rpm-rectangle-port-cylinder-head","provider":"MOTORMIA","version":"1.0","type":"link"}