{"product_id":"ppe-power-cylinder-head-one-cast-iron-lb7-110100101","title":"PPE Power Cylinder Head (One) Cast Iron LB7 - 110100101","description":"PPE Power Cylinder Head (One) Cast Iron LB7 - 110100101\u003cbr\u003e\u003cbr\u003e OEM Duramax cast aluminum cylinder heads fall short over time; the \ndifferent heat expansion crates between cast iron engine block and cast \naluminum cylinder head cause head gasket scrubbing, and eventually blown \nhead gaskets. Aluminum cylinder heads are also prone to warping, melting, \nand\/or cracking in high performance applications where excessive heat is \nintroduced.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003ePacific Performance Engineering LB7 cast iron cylinder heads are the \nultimate upgrade to your Duramax engine and eliminate any head gasket or \ncracking concerns. Cast from high-quality alloyed grey iron, PPE LB7 \ncylinder heads offer elevated fatigue strength and heat and creep \nresistance, which prolongs the cylinder head's lifespan significantly. They \nalso share the same heat expansion rate as the stock cast iron cylinder \nblock, so no more blown head gaskets. These cylinder heads also feature \ncast-in fuel injector cups and solve the OEM injector cup leaking issue.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eEach head comes complete with brand new springs, spring retainers, spring \nlocators, valves, valve seals, valve keepers, valve seats, valve guides, \nrocker arm dowels, and freeze plugs. Whether you have a damaged aluminum \ncylinder head or a desire for better reliability and longevity on your \nDuramax engine, the Pacific Performance Engineering LB7 cast iron cylinder \nhead is undoubtedly the best choice.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eComponent features and benefits:\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e* Premium 21-4N, Stellite-reinforced exhaust valves, and chrome-silicon \nalloy intake valves\u003cbr\u003e\u003cbr\u003e* All valves are fully nitridated with increased abrasion resistance\u003cbr\u003e\u003cbr\u003e* High-strength, CNC-machined chromoly steel spring retainers and spring \nlocators\u003cbr\u003e\u003cbr\u003e* Upgraded tapered valve springs provide faster response and eliminate \nvalve float at high rpms\u003cbr\u003e\u003cbr\u003e* Powdered metal valve seats offer superior wear and heat resistance\u003cbr\u003e\u003cbr\u003e* Significantly reduced diesel engine clatter compared to the factory \naluminum cylinder heads\u003cbr\u003e\u003cbr\u003e* Increased thermal efficiency compared to aluminum heads\u003cbr\u003e\u003cbr\u003e* 3-Year Unlimited Mileage Warranty\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e","brand":"PPE Power","offers":[{"title":"Default Title","offer_id":48145179738370,"sku":"PPE-110100101","price":1349.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/www.lethalperformance.com\/products\/ppe-power-cylinder-head-one-cast-iron-lb7-110100101","provider":"Lethal Performance","version":"1.0","type":"link"}