INDUSTRIAL INJECTION PDM-LLYRH DURAMAX LLY PORTED & POLISHED CYLINDER HEADS 2004.5-2006 GM DURAMAX 6.6L LLY

The Industrial Injection LLY Duramax Ported & Polished Cylinder Heads are meticulously crafted for the hardcore racer and sled puller. These heads are not your standard upgrade; they are designed to unleash maximum power and performance for your 2004.5-2006 GM Duramax 6.6L LLY engine.

Crafted with precision and expertise, the cylinder heads undergo an intensive process starting with a thorough jet wash to remove any traces of oil and dirt. Followed by glass bead blasting to eliminate carbon buildup, each head is then rigorously examined through magnafluxing or pressure testing for quality assurance. Any necessary valve guide and seat removal is performed in preparation for the porting process.

The heart of these cylinder heads lies in their port development, meticulously executed using a state-of-the-art Super Flow 600 flow bench with computerized recording. Beyond just enhancing airflow, careful consideration is given to factors like port wall thickness to optimize performance. The porting itself is conducted using a cutting-edge 5 Axis CNC Cylinder Head Porting Machine with specialized CAD/CAM software, ensuring consistent flow across all ports for balanced power production and seamless tuning.

Incorporating new high-strength alloy, heat-treated iron-based valve guides with advanced spiral grooving for improved lubrication, these heads prioritize longevity and durability. Premium nickel-based non-magnetic valve seat inserts and a multi-angle valve job further enhance airflow efficiency and performance.

Engineered with 130LB valve springs and unshrouded valves, these cylinder heads are sold as a pair and require re-usable cores for full credit. Elevate your Duramax engine with the Industrial Injection LLY Duramax Ported & Polished Cylinder Heads and experience next-level power and reliability on the track or trail.