PPE 110100103 CAST IRON CYLINDER HEAD (ONE) FOR 04.5-10 GM 6.6L DURAMAX LLY/LBZ/LMM

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.

PPE’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 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.

Each 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.  

Whether 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.

*Important Note: The valve seats of the PPE Heavy Cast Iron Cylinder Heads are installed with an interference that maximizes the durability and lifespan of the cylinder heads. Such interference might not be optimal for extreme-performance applications where a significant amount of heat is created. For those applications, PPE suggests that the exhaust valve seats be replaced with higher interference (+0.006'' to +0.008'') oversized exhaust valve seats (Nominal size 34mm).

Features

• Specially alloyed gray cast iron liquid-cooled cylinder head
• Higher strength in high temperatures and creep resistance
• Eliminates head gasket scrubbing issue (blown head gasket)
• Higher fatigue strength and heat resistance
• Premium 21-4N, Stellite-reinforced exhaust valves
• Fully nitridated valves, better abrasion resistance
• High-strength Chromoly CNC machined spring retainers and locators
• Upgraded springs, faster response
• Ready to install - comes with all valvetrain components, rocker arm dowels, injector pads, and freeze plugs
• Increased thermal efficiency compared to aluminum heads

VEHICLE FITMENT: 

The PPE 110100103 Cast Iron Cylinder Head is a game-changer FOR owners of 2004.5-2010 GM 6.6L Duramax LLY/LBZ/LMM engines. Designed to address the shortcomings of OEM cast-aluminum cylinder heads, this product offers unmatched durability and performance. Engineered to be 50 States Emissions Legal (E.O. D-701-38), this cast iron cylinder head eliminates the common issue of head gasket scrubbing and blown head gaskets caused by the differing heat expansion rates between the engine block and cylinder head.

Crafted from high-quality alloyed gray iron, the PPE Cylinder Head boasts superior fatigue strength, heat resistance, and creep resistance, ensuring a longer lifespan FOR your engine. By sharing the same heat expansion rate as the stock cylinder block, this upgrade guarantees a reliable solution to prevent blown head gaskets.

Each cylinder head comes equipped with upgraded valve train components, including valves made from superior materials and fully nitridated FOR optimal performance. The tapered valve springs with a higher spring rate and lighter retainers/locators deliver improved response at higher RPMs, eliminating valve float. Additionally, powder metal valve seats offer exceptional wear and heat resistance, enhancing overall engine efficiency.

With the PPE Cast Iron Cylinder Head, you can say goodbye to the concerns of warping, melting, or cracking often associated with aluminum cylinder heads. Whether you're looking to replace a damaged head or seeking enhanced reliability FOR your Duramax engine, this product is the ultimate choice FOR seamless performance and longevity. Please note that the use of LBZ/LMM glow plugs is required FOR LLY engines.

Experience unparalleled quality and durability with the Duramax Iron Heads Upgrade by PPE - your trusted partner FOR optimizing your engine's potential.