{"product_id":"power-driven-stage-4-race-cnc-ported-24v-cylinder-head-cr-6-4l-6-7l-cummins","title":"Power Driven Stage 4 Race CNC-Ported Billet Shelf Cylinder Head for CR 6.4L\/6.7L Cummins","description":"\u003cp\u003e\u003cstrong\u003eStage 4 Extreme Street\/Race Port Induction 24v Cylinder Head for 6.4L \u0026amp; 6.7L Cummins\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUpgrade your race truck with this 6.4L or 6.7L Cummins with a PDD Stage 4 Race Ported 24v head.  These cylinder heads are engineered for competition use and are designed to take your 6.4L or 6.7L Cummins to the next level. This Stage 4 Cylinder Head includes a Kingspeed billet intake shelf.\u003c\/p\u003e\n\u003cp\u003eProfessional installation is required. Installation error is not covered under \u003ca href=\"https:\/\/powerdriven.com\/pages\/cylinder-head-warranty\" rel=\"noopener\" target=\"_blank\"\u003ewarranty\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"tight\" dir=\"ltr\"\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eInduction-Hardened Valve Seats\u003c\/strong\u003e: Integrated seats eliminate the chance of a dropped seat, ensuring reliability under extreme conditions. \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eStage 4 CNC Porting\u003c\/strong\u003e: Delivers a \u003cstrong\u003e60% airflow increase\u003c\/strong\u003e, achieving \u003cstrong\u003e272 CFM intake flow\u003c\/strong\u003e and \u003cstrong\u003e248 CFM exhaust flow\u003c\/strong\u003e for superior performance and reduced exhaust gas temperatures (EGT).\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOversized 36mm (1.42\") Inconel Intake Valves \u003c\/strong\u003eand \u003cstrong\u003e34mm (1.34\") Inconel Exhaust Valves\u003c\/strong\u003e eliminate tuliped valves that plague this industry (Minimum 4.125\" bore size required)\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eCNC-Cut Fire-Ring Grooves\u003c\/strong\u003e: Optional precision-machined 4.550″ grooves enhance sealing for high-horsepower applications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eThreaded Freeze Plugs\u003c\/strong\u003e: Replace soft factory plugs to eliminate coolant leaks under the valve cover, preventing oil-coolant mixing.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eSuperior Construction\u003c\/strong\u003e:\u003c\/p\u003e\n\u003cul class=\"tight\" dir=\"ltr\"\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eNewen CNC Multi-Angle\u003c\/strong\u003e valve job for optimal sealing and class-leading low-lift flow.\u003cbr\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\"\u003ePDD 125# performance valve springs, locks, retainers, and valve seals for milder applications utilizing cast camshafts up to 5,000 RPM. (0.450\" maximum lift)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eOptional upgraded PDD 180# dual valve springs, locks, retainers, and valve seals for extreme applications running 100+ psi boost, up to 7,000 RPM. Extreme spring load may require cam bushings, steel camshaft, and steel lifters (0.525\" maximum lift).\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tight\" dir=\"ltr\"\u003e\n\u003cli\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eBrand New, No Core Required\u003c\/strong\u003e: A fresh cylinder head, ready to install without the need for a core return.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMade to order - Please Call for ETA\u003cbr\u003e\u003cbr\u003e\n\u003c\/h2\u003e","brand":"Power Driven Diesel","offers":[{"title":"PDD 125# Valve Spring \/ Split Fire Ring (4.550\" x 0.021\" depth)","offer_id":53209914671391,"sku":"RCC0198","price":8500.0,"currency_code":"USD","in_stock":true},{"title":"PDD 125# Valve Spring \/ Full Fire Ring (4.550\" x 0.041\" depth)","offer_id":53209919521055,"sku":"RCC0199","price":8500.0,"currency_code":"USD","in_stock":true},{"title":"PDD 125# Valve Spring \/ No Fire Ring","offer_id":53209919553823,"sku":"RCC0200","price":8500.0,"currency_code":"USD","in_stock":true},{"title":"PDD 125# Valve Spring \/ Custom Depth - must provide depth to sales","offer_id":53209922765087,"sku":"RCC0201","price":8600.0,"currency_code":"USD","in_stock":true},{"title":"PDD 180# Dual Valve Spring \/ Split Fire Ring (4.550\" x 0.021\" depth)","offer_id":53209914704159,"sku":"RCC0202","price":9000.0,"currency_code":"USD","in_stock":true},{"title":"PDD 180# Dual Valve Spring \/ Full Fire Ring (4.550\" x 0.041\" depth)","offer_id":53209919586591,"sku":"RCC0203","price":9000.0,"currency_code":"USD","in_stock":true},{"title":"PDD 180# Dual Valve Spring \/ No Fire Ring","offer_id":53209919619359,"sku":"RCC0204","price":9000.0,"currency_code":"USD","in_stock":true},{"title":"PDD 180# Dual Valve Spring \/ Custom Depth - must provide depth to sales","offer_id":53209922797855,"sku":"RCC0205","price":9100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0874\/9098\/6271\/files\/Power-Driven_Cylinder-Head_01_0825_96aba2e0-0b1a-470f-afc0-213714d16a54.jpg?v=1771532249","url":"https:\/\/powerdriven.com\/fr\/products\/power-driven-stage-4-race-cnc-ported-24v-cylinder-head-cr-6-4l-6-7l-cummins","provider":"Power Driven Diesel","version":"1.0","type":"link"}