INDUSTRIAL INJECTION PDM-LBZ/LMMRH GM RACE HEADS FOR 06-10 LBZ LMM 6.6L DURAMAX

The Industrial Injection LBZ/LMM Duramax Race Heads are designed for the racer / sled puller in mind. Fully CNC ported heads complete ready to bolt on.

Heads are first jet washed in a high pressure spray cabinet to remove oil and dirt, then glass beaded to remove carbon. Next they are checked by magnafluxing, (cast iron only) or pressure testing. They are visually inspected for defects that would make them unusable. Valve guides and seats are removed as needed for porting.

Port development is accomplished using a superflow 600 flow bench with a computer recording all flow measurements.

Many things are considered when designing a cylinder head Port; air flow is only one of the things to think about. Another major concern is port wall thickness.

Anyone can get a head to produce high flow numbers, but if doing so leaves the port wall to thin the casting will crack. High performance Diesel heads are more prone to crack because of the thermal shock experienced by excessive intermittent or long term exhaust temperatures.

The porting is then preformed using a new 5 Axis CNC Cylinder Head Porting Machine with CAD/CAM software specifically designed for cylinder head porting. CNC porting brings unparalleled accuracy to head porting with each port flowing the same. This helps balance the power that each cylinder produces, making tuning easier.

New High Strength Alloy, Heat Treated iron based valve guides are installed. These guides are heat treated to Rockwell 22 Scale, which produces the ultimate in wear resistance. This is far superior to original guide material, including Bronze. The guide incorporates a spiral grove inside the guide to hold oil and aid the lubrication of the valve during engine operation.

Guides are then honed (not reamed) to exact size using a diamond honing mandrel. Diamond abrasives allow for consistency of size, surface finish, and bore geometry with no variation from guide to guide. The guide size is then verified using a valve guide bore gauge.

As needed the head receives new Premium valve seat inserts made from a true Nickel Based Non-Magnetic material that was developed for extreme operating conditions.

Next the head is treated to a multi angle valve job to help maximize the flow of air in and out of the head. This is accomplished using a Serdi 100 guide and seat machine. Serdi uses a solid carbide straight shank pilot.

When inserted into the valve guide, it simulates the real valve stem during the centering process. This guarantees the valve seat is finished for a perfect valve to seat match.

Using CBN or Diamond tooling the head is given a new surface. With our berco milling machine we can control the surface finish to accommodate different head gasket types. For example MLS head gaskets require a very smooth surface finish.

Finally the head is jet washed dried and assembled with new valve seals and new performance valve springs.

Features:

5 Axis CNC Cylinder Head Porting Machine with CAD/CAM software specifically designed for cylinder head porting

• Diamond Honed Guides
• Unshrouded Valves
• High Strength Alloy, Heat Treated iron based valve guides
• Premium valve seat inserts made from a true Nickel Based Non-Magnetic material
• Multi angle valve job
• Performance 95LB valve springs
• Sold in a pair

Note: To receive full core credit we need a good, re-useable pair of cylinder heads. No cracks, warping, or excessive wear.

The INDUSTRIAL INJECTION PDM-LBZ/LMMRH GM Race Heads are expertly engineered for enthusiasts and competitors pushing the limits of their 2006-2010 LBZ/LMM 6.6L Duramax engines. Designed with the racer and sled puller in mind, these fully CNC-ported heads arrive ready to bolt on, ensuring a hassle-free upgrade to your performance engine.

Each set begins with an extensive cleaning process, utilizing high-pressure jet washing followed by glass bead blasting to eliminate oil and carbon. They undergo rigorous quality control, including magnafluxing and pressure testing, to guarantee reliability. Any necessary valve guides and seats are meticulously prepared for optimal port development.

Employing a cutting-edge Superflow 600 flow bench, every head is subjected to precise measurements, ensuring superior airflow without compromising port wall thickness—a key factor in preventing cracking under extreme conditions. The advanced 5 Axis CNC Cylinder Head Porting Machine enhances consistency across every port, balancing power output for each cylinder seamlessly.

The installation of premium, high-strength alloy, heat-treated iron valve guides ensures exceptional wear resistance, significantly outperforming standard materials. Featuring a unique spiral grove design, these guides optimize lubrication for smoother operation. Further enhancing performance, the heads are fitted with new nickel-based, non-magnetic valve seat inserts that excel in extreme conditions, coupled with a multi-angle valve job performed on a state-of-the-art Serdi 100 machine for optimal air flow.

Final touches involve precision milling for compatibility with various head gasket types, followed by assembly with new valve seals and high-performance 95LB valve springs. Each pair is sold as a complete unit, making these GM Race Heads an essential component for serious diesel performance aficionados. To ensure core credit, a reusable pair of cylinder heads, free from defects, is required.