2001-2004 LB7 Duramax Premium Stock Plus Cylinder Heads w/ Torque Lock Cups (RH & LH Set) - Industrial Injection - PDM-LB7SH-TL

2001-2004 LB7 Duramax Premium Stock Plus Cylinder Heads w/ Torque Lock Cups (RH and LH Set)
Restore factory performance and long-term reliability to your 2001-2004 LB7 Duramax 6.6L with these stock remanufactured cylinder heads, professionally upgraded with Torque Lock injector cups to permanently address one of the LB7’s most common failure points-injector cup movement and coolant intrusion.
Designed as a direct bolt-on replacement, these remanufactured Duramax heads are rebuilt to OE specifications, thoroughly inspected, pressure tested, and precision machined to deliver dependable performance for stock rebuilds or mild performance applications. Whether you’re replacing failed heads or performing a preventative upgrade, these heads provide a proven solution for long-term durability.
Key Features
Stock remanufactured LB7 Duramax cylinder heads
Upgraded with Torque Lock injector cups for superior sealing and retention
Eliminates common LB7 injector cup failure and coolant intrusion issues
Fully cleaned, pressure tested, and resurfaced
Diamond honed valve guides
Unshrouded valves for improved airflow
High-strength, heat-treated iron-based valve guides
Premium nickel-based, non-magnetic valve seat inserts
Multi-angle valve job
New valve springs installed
Assembled and ready for installation
Ideal for stock replacement or mild performance builds
Torque Lock Injector Cup Upgrade
Unlike factory press-in injector cups or aftermarket cupless head castings, Torque Lock injector cups are mechanically locked in place to prevent movement under high heat and pressure. This design significantly reduces the risk of injector leaks, combustion gas intrusion, and coolant contamination-making these heads a superior upgrade over standard remanufactured LB7 heads.
What’s Included
Left and right remanufactured LB7 cylinder heads
Pre-installed Torque Lock injector cups
Fully assembled and ready to install
Not Included: Gaskets, head bolts, injectors, or installation hardware
Vehicle Fitment
2001-2004 GM Duramax LB7 6.6L
Chevrolet Silverado 2500HD / 3500HD
GMC Sierra 2500HD / 3500HD
Why Choose These LB7 Reman Heads?
OE-style performance with modern reliability upgrades
Proven solution for LB7 injector cup failures
Ideal for cylinder head replacement or preventative upgrades
Professionally remanufactured and quality-checked
Built for long-term durability and peace of mind
Core Return Information
Sold as a matched left and right pair.
To receive full core credit, a good, reusable pair of LB7 cylinder heads must be returned. Cores must be free of cracks, excessive warping, or severe damage. Core returns are required within 90 days of purchase.