{"product_id":"cummins-6-7l-stage-4-concrete-filled-ported-polished-cylinder-head-w-fire-ring-grooves","title":"2007.5-2018 Cummins Stage 4 Concrete Filled Ported \u0026 Polished Cylinder Head w\/ Fire Ring Grooves (PDM-67RHS3)","description":"\u003ch6\u003eDescription\u003c\/h6\u003e\n\u003cp\u003eThe PDM-67RHS3 is Industrial Injection's Stage 4 race head for the 2007.5-2018 6.7L Cummins — the top of the race head ladder. Fully CNC-ported with fire ring grooves, custom-port oversized 34mm valves, and concrete-filled water jackets to reinforce the deck against extreme cylinder pressure. Built for sled pullers and racers where head deformation is the limiting factor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e PDM-67RHS3\u003c\/p\u003e\n\n\u003ch6\u003eFeatures\u003c\/h6\u003e\n\u003cul\u003e\n  \u003cli\u003eStage 4 race head — concrete-filled\u003c\/li\u003e\n  \u003cli\u003e5-axis CNC porting on intake and exhaust ports\u003c\/li\u003e\n  \u003cli\u003eFire ring grooves machined into the deck surface\u003c\/li\u003e\n  \u003cli\u003eCustom-port oversized 34mm stainless steel valves\u003c\/li\u003e\n  \u003cli\u003eUnshrouded valves\u003c\/li\u003e\n  \u003cli\u003eDiamond-honed high-strength alloy heat-treated iron-based valve guides\u003c\/li\u003e\n  \u003cli\u003ePremium nickel-based non-magnetic valve seat inserts\u003c\/li\u003e\n  \u003cli\u003eMulti-angle valve job\u003c\/li\u003e\n  \u003cli\u003e120lb performance valve springs\u003c\/li\u003e\n  \u003cli\u003eMilled off intake to accept ZZ Fab side runner\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eNotes\u003c\/h6\u003e\n\u003cul\u003e\n  \u003cli\u003e34mm valves will not clear a 5.9 bore — must have a 6.4 or 6.7 bore to clear.\u003c\/li\u003e\n  \u003cli\u003eFilled water jackets are intended for competition use only — not for street.\u003c\/li\u003e\n  \u003cli\u003eDesigned to run with a fire ring head gasket — confirm gasket and stud package before ordering.\u003c\/li\u003e\n  \u003cli\u003eHead studs and head gasket sold separately.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Industrial Injection","offers":[{"title":"Default Title","offer_id":52398540390768,"sku":"PDM-67RHS3","price":10337.64,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2084\/8209\/files\/2007_5-2018-Cummins-Stage-4-Concrete-Filled-Ported-Polished-Cylinder-Head-WFire-Ring-Grooves-PDM-67RHS3-Cylinder-Head-Industrial-Injection-Canada.jpg?v=1754778736","url":"https:\/\/www.dirtydieselcustom.ca\/products\/cummins-6-7l-stage-4-concrete-filled-ported-polished-cylinder-head-w-fire-ring-grooves","provider":"Dirty Diesel Customs","version":"1.0","type":"link"}