2001 - 2004 GM 6.6L LB7 Duramax Diesel
Required Information: Your Vehicle year and VIN # will give us all info needed to get you the exact replacement engine for your power-train and electronics to match up. If you are buying for a conversion, please contact us before purchase and we can help!
Shipping/Handling & Core Return: Free Flat-Rate freight to commercial address with either a loading dock or fork lift. Residential delivery is available for additional charge. Lift-Gate truck service available at an additional charge. Customer is responsible for freight on core return only. Cores must be like for like and in usable condition to be eligible for core refund.
Break-In Procedure: All Industrial Injection short blocks and long blocks are required to be ran with Joe Gibbs Break In Oil (not included) for the initial 300-500 miles.
Part # PDM-LB7STKLB
Restore factory performance and long-term reliability to your 2001–2004 LB7 Duramax 6.6L with the Industrial Injection Premium Stock Plus Long Block Engine. Designed to eliminate many of the common failure points associated with the factory Duramax platform, this complete long block combines premium engine components, precision machining, and proven assembly techniques to deliver exceptional durability and dependable performance.
Every Premium Stock Plus Long Block is built using the highest quality parts and machining processes available. From the balanced and blueprinted rotating assembly to the professionally reconditioned Premium Stock Plus cylinder heads, each engine is meticulously assembled and tested to ensure maximum reliability and longevity. Whether you're replacing a failed engine or building a dependable daily driver, towing rig, or work truck, this long block provides a complete, ready-to-install foundation built to last.
Every Industrial Injection Premium Stock Plus Long Block is precision machined, balanced, and assembled to exacting specifications. The rotating assembly is carefully balanced and blueprinted to ensure smooth operation and consistent performance throughout the engine's lifespan.
Industrial Injection X Series coated, chamfered, and de-lipped pistons help improve durability while reducing stress concentrations commonly found in factory piston designs. Combined with a keyed crankshaft, keyed camshaft, pinned oil pump, and premium ARP fasteners, this engine is engineered to provide exceptional reliability in both stock and mild performance applications.
The included Premium Stock Plus cylinder heads are professionally reconditioned, resurfaced, and assembled with premium components. Featuring diamond honed valve guides, high-strength heat-treated valve guides, premium nickel-based valve seat inserts, new unshrouded valves, and new valve springs, these heads are built to provide excellent sealing, airflow, and long-term durability.
Exclusive to the LB7 Premium Stock Plus platform, the cylinder heads are upgraded with Industrial Injection Torque Lock Injector Cups. Unlike factory press-fit injector cups, Torque Lock cups are mechanically secured within the cylinder head to prevent movement under extreme heat and cylinder pressure. This proven upgrade helps eliminate one of the most common LB7 failure points by reducing the risk of injector cup movement, coolant intrusion, combustion leaks, and injector sealing issues.
Premium C Grade head gaskets and ARP 2000 head studs provide superior clamping force and sealing capability, helping ensure reliable performance under demanding towing, daily driving, and work truck conditions.
Each completed long block undergoes simulation testing and rigorous quality control procedures before leaving our facility.
2001–2004 GM Duramax LB7 6.6L
This engine is backed by Industrial Injection's 2-Year Warranty.
For proper engine break-in, Industrial Injection recommends using Driven Racing Oil (Joe Gibbs) Break-In Oil for the first 300–500 miles of operation. Break-in oil is not included with the engine.
WARNING : This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov
Industrial Injection
Industrial Injection
Industrial Injection
Industrial Injection
Industrial Injection