{"product_id":"2001-2004-gm-6-6l-duramax-cast-iron-cylinder-head-one-lb7","title":"2001-2004 GM 6.6L Duramax Cast Iron Cylinder Head (One) LB7","description":"\u003cp\u003e50 States Emissions Legal (E.O. D-701-38) The 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 new LB7 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 gray iron, the PPE Cylinder Head offers elevated fatigue strength, and heat and creep resistance, which prolongs the cylinder head's lifespan significantly.\u003c\/p\u003e\n\u003cp\u003ePPE Cylinder Heads also share the same heat expansion rate as the stock cast-iron cylinder block no more blown head gaskets. PPE LB7 Cylinder Heads also feature cast-in fuel injector cups and solve the OEM injector cup leaking issue.\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 tapered valve springs' higher spring rate and lighter retainers\/locators enable faster response during higher RPMs and eliminate valve float. Powder metal 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\u003eDuramax Iron Heads Upgrade: Diesel World\u003c\/p\u003e\n\u003cp\u003eUnboxing PPEs new Duramax cylinder heads!: LinCo Diesel Performance\u003c\/p\u003e\n","brand":"Pacific Performance Engineering","offers":[{"title":"Default Title","offer_id":63457280557425,"sku":"110100101-HFTD","price":1349.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0990\/4363\/9665\/files\/110100101-HFTD.jpg?v=1776377669","url":"https:\/\/valentinedieselperformance.com\/products\/2001-2004-gm-6-6l-duramax-cast-iron-cylinder-head-one-lb7","provider":"Valentine Diesel Performance","version":"1.0","type":"link"}