{"product_id":"ppe-upgraded-cast-iron-cylinder-head-set-for-2004-5-2010-gmc-chevy-6-6l-duramax","title":"PPE Upgraded Cast Iron Cylinder Head Set For 2004.5-2010 GMC Chevy 6.6L Duramax","description":"\u003cp\u003eThe OEM Duramax cast-aluminum cylinder heads fall short over time - the different heat expansion rates between cast-iron engine block and cast-aluminum cylinder head cause head gasket scrubbing, and eventually blown head gaskets. The aluminum cylinder heads are also prone to warping, melting and\/or cracking in high-performance applications where excessive heat is introduced\u003c\/p\u003e\n\u003cp\u003ePPE’s Cast Iron Cylinder Head is the ultimate upgrade to your Duramax engine and eliminates any head gasket or cracking concerns. Cast from high quality alloyed grey iron, the PPE Cylinder Head offers elevated fatigue strength, heat and creep resistance, which prolongs the cylinder head’s lifespan significantly. PPE Cylinder Heads also share the same heat expansion rate as the stock cast-iron cylinder block – no more blown head gaskets\u003c\/p\u003e\n\u003cp\u003eEach head comes complete with upgraded valve train components. All valves are made of superior materials and fully nitridated. The valve springs feature higher spring rate, lighter retainers\/locators, enabling faster response during higher RPMs. Alloy valve seats provide superior wear and heat resistance. The denser and stiffer material properties from the cast-iron construction also significantly reduce engine clatter\u003c\/p\u003e\n\u003cp\u003eWhether you have a damaged aluminum cylinder head or a desire for better reliability and longevity on your Duramax engine, the PPE Cast Iron Cylinder Head is undoubtedly the best choice\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSpecially alloyed gray cast iron liquid-cooled cylinder head\u003c\/li\u003e\n\u003cli\u003eSuperior heat resistance and creep resistance\u003c\/li\u003e\n\u003cli\u003eEliminates head gasket scrubbing issue (blown head gasket)\u003c\/li\u003e\n\u003cli\u003eBetter thermal efficiency and fuel efficiency than factory aluminum heads\u003c\/li\u003e\n\u003cli\u003eHigher fatigue strength and heat resistance \u003c\/li\u003e\n\u003cli\u003ePremium 21-4N, Stellite-reinforced exhaust valves\u003c\/li\u003e\n\u003cli\u003eFully nitridated intake and exhaust valves for better abrasion resistance\u003c\/li\u003e\n\u003cli\u003eCase-hardened chromoly spring retainers\/locators\u003c\/li\u003e\n\u003cli\u003eUpgraded springs for better responsiveness\u003c\/li\u003e\n\u003cli\u003eReady to install - comes with installed valves\/springs, rocker arm dowels, and freeze plugs\u003c\/li\u003e\n\u003cli\u003e3 Year Limited Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cul\u003e\n\u003cli\u003e2004.5-2010 GMC Sierra 2500\/3500 6.6L Duramax\u003c\/li\u003e\n\u003cli\u003e2004.5-2010 Chevrolet Silverado 2500\/3500 6.6L Duramax \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e(2) Cylinder Heads\u003c\/li\u003e\n\u003cli\u003eValves\/Springs\u003c\/li\u003e\n\u003cli\u003eRocker Arm Dowels \u003c\/li\u003e\n\u003cli\u003eFreeze Plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eThis Product Cannot Be Shipped To California\u003c\/li\u003e\n\u003cli\u003eRequires The Use Of LBZ\/LMM Glow Plugs On LLY Engines\u003c\/li\u003e\n\u003cli\u003eUpgraded Pushrods Are Recommended \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":47540482080925,"sku":"(2) 110100103","price":2699.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0645\/2504\/1821\/files\/1.5_c2cfb2f9-e432-4539-ac2b-27c1b9096886.png?v=1767991929","url":"https:\/\/rudysdiesel.com\/products\/ppe-upgraded-cast-iron-cylinder-head-set-for-2004-5-2010-gmc-chevy-6-6l-duramax","provider":"Rudy's Performance Parts","version":"1.0","type":"link"}