{"product_id":"prc-stage-2-5-5-3l-58-63cc-cnc-ported-cylinder-heads","title":"PRC Stage 2.5 5.3L 58-63cc CNC Ported Cylinder Heads","description":"The PRC Stage 2.5 5.3L CNC Ported Heads are designed to enhance performance through advanced CNC porting and machining. These are an outright purchase, meaning you receive new castings without needing to exchange your old ones.\n\nThese heads come standard with 2.02″ intake and 1.575″ stainless steel exhaust valves, and feature 58-63cc combustion chambers. They also include a PRC .650″ lift dual valve spring kit, complete with dual springs, titanium retainers, seats, and seals. The heads are fully assembled and milled to your specific requirements. Flow data indicates superior performance with intake flow reaching 308 cfm and exhaust flow reaching 223 cfm at .600″ lift.\n\nAn optional upgrade is available for the PRC .675″ Lift EHT Dual Valve Spring Kit, which offers extended durability. This kit includes dual valve springs rated to .675” lift, precision-machined titanium retainers, hardened machined spring seats, and new Viton valve seals.\n\nExtensively researched and tested, PRC cylinder heads prioritize quality and performance. The company states that customers will not find a better performing cylinder head at this price point.","brand":"Texas Speed \u0026 Performance","offers":[{"title":"Default Title","offer_id":52866431222072,"sku":"199-5.32.5","price":1299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687711835.png?v=1787907803","url":"https:\/\/store.motormia.co\/products\/prc-stage-2-5-5-3l-58-63cc-cnc-ported-cylinder-heads","provider":"MOTORMIA","version":"1.0","type":"link"}