cylinder heads

Reliable Power With PPE Cylinder Heads



GM 6.6L Duramax Cast Iron Cylinder Heads- LB7/LLY/LBZ/LMM/LML

Designed with superior durability and performance in mind, you can confidently upgrade your 6.6L Duramax engine with PPE’s Cast Iron Cylinder Heads. Unlike OEM aluminum heads, that contribute to blown head gaskets and are subject to warping, PPE’s cast iron heads are engineered to match the thermal expansion of the cast iron block preventing these issues. Made from high-strength gray iron PPE's cylinder heads offer enhanced fatigue strength, heat resistance, and crack prevention. Whether you're replacing damaged heads, or boosting performance, PPE’s Cast Iron Cylinder Heads help provide long lasting reliability and consistent performance.

Cylinder Head

Key Features & Benefits:

  • Specially alloyed gray cast iron liquid-cooled cylinder head with elevated strength in high temperatures and creep resistance COffers the same heat expansion rate as the OEM iron block which completely resolves the common head gasket scrubbing issue (blown head gasket)
  • Higher fatigue strength and heat resistance significantly extend cylinder head lifespan
  • Premium 21-4N, Stellite-reinforced exhaust valves, and chrome-silicon alloy intake valves
  • All valves are fully nitridated with increased abrasion resistance
  • High-strength Chromoly steel CNC machined spring retainers and spring locators
  • Upgraded tapered valve springs provide faster response and eliminate valve float at high RPMs
  • Powdered metal valve seats offer superior wear and heat resistance
  • Significantly reduced diesel engine clatter compared to the factory aluminum cylinder heads
  • Increased thermal efficiency compared to aluminum heads

Cast Iron Cylinder Heads:

Performance Transmission Mount

The PPE Performance Transmission Mount is a critical upgrade for any GMC/Chevrolet HD truck owner seeking superior durability, performance, and reliability. Factory transmission mounts, notorious for their weak rubber compounds and high-shear-load design, can degrade quickly under stress. These stock mounts often lead to excessive vibration, driveline misalignment, and hard shifting - especially under sustained heavy loads or during aggressive driving.

The PPE Transmission Mount is engineered to tackle all the weaknesses of factory mounts through a complete redesign. Featuring dual-silicone bushings, it reduces shear load significantly and distributes pressure more efficiently. The 30% larger steel-to-elastomer contact area ensures that the load on each square inch of rubber is reduced, further minimizing the risk of failure under high stress. The premium-grade silicone compound used in the mount is heat-resistant, weatherproof, and tear-resistant, providing long-lasting durability. It thrives in environments with high vibrations, heavy loads, extreme temperatures, reliably anchoring your transmission to the chassis.

Transmission Mount

Key Features & Benefits:

  • Dual-silicone-bushing design reduces shear load and enhances durability
  • 30% increased contact area reduces stress and improves longevity
  • Reduced vibration and driveline misalignment
  • Improved shifting performance
  • Available in three bushing durometer hardnesses – 30A, 50A, 70A
  • Interchangeable silicone bushing accommodates various driving applications
  • Increased thermal efficiency compared to aluminum heads

Bushing Options:

  • Purple (30A): Ideal for street applications, offering a balance of comfort and performance for everyday driving.
  • Green (50A): Perfect for hybrid use, blending off-road capability and street comfort, making it versatile for mixed-use scenarios.
  • Red (70A): Designed for strip and high-performance applications, this version is for those who demand maximum stiffness and control during high-torque, aggressive driving.

Applications:

Engine Mount Kit

Stock engine mounts fail over time as bushings deteriorate. This causes vibration and engine noise to become more pronounced. Degradation is accelerated in high-power engine applications. PPE High-Performance Silicone Engine Mount Kits are engineered to anchor the engine and improve ride quality. The premium silicone bushings are designed to last the life of the vehicle, handle the high heat of the engine bay, and isolate vibration much better than polyurethane bushings. PPE Engine Mount Kit Bushings are available in four different hardness (durometer) options: 40A = softest to 70A = firmest. The 50A is closest to OEM firmness.

Engine Mount

Bushing Options:

  • Blue (40A): Smoother than OEM, perfect for daily driving.
  • Green (50A): OEM Firmness, offering a balance of comfort and performance for everyday driving.
  • Yellow (60A): Perfect for hybrid use, blending off-road capability and street comfort, making it versatile for mixed-use scenarios.
  • Red (70A): Designed for strip and high-performance applications, this version is for those who demand maximum stiffness and control during high-torque, aggressive driving.

Applications:

on May 05, 2025 Categories: Promotional Content