Industrial Injection LB7 Duramax Stage 2 Short Block Engine (2001-2004)

Take your 2001–2004 LB7 Duramax to the next level with the Industrial Injection Stage 2 Short Block. Designed for high-horsepower street trucks, drag racing, sled pulling, and competition applications, this engine package is built to handle serious power while maintaining the durability and reliability that Industrial Injection engines are known for.

Every Stage 2 Short Block is precision machined, balanced, blueprinted, and assembled using premium performance components. From the Wagler forged connecting rods and 14mm Gorilla Girdle to the billet alternate firing camshaft and X Series pistons, this engine is engineered to withstand extreme cylinder pressures and demanding performance environments.

Key Features

• Balanced and blueprinted rotating assembly
• Sim tested short block
• Industrial Injection X Series coated, chamfered, and de-lipped pistons
• Balanced and keyed OEM Duramax crankshaft
• 14mm Gorilla Girdle with ARP main studs
• Wagler HD forged connecting rods
• Industrial Injection keyed billet alternate firing camshaft
• ATI Super Damper
• Billet flexplate
• Pinned oil pump
• New water pump
• New oil pickup tube
• Stock oil pan
• Built for high-performance and competition use
• Optional billet crankshaft upgrade available

Stage 2 Performance Engine Construction

The Industrial Injection Stage 2 Short Block is designed for enthusiasts who demand more than a stock replacement engine. Every rotating assembly is balanced and blueprinted to ensure smooth operation and maximum durability under high horsepower conditions.

Industrial Injection X Series pistons provide enhanced strength and durability, while Wagler HD forged connecting rods and the 14mm Gorilla Girdle help reinforce the bottom end against extreme cylinder pressures. The keyed crankshaft, keyed billet alternate firing camshaft, pinned oil pump, ATI Super Damper, and Billet flexplate work together to create a foundation capable of handling serious performance and competition use.

Each engine is simulation tested and subjected to rigorous quality control procedures before leaving our facility.

What's Included

• Fully assembled LB7 Duramax Stage 2 short block
• Industrial Injection X Series pistons
• Balanced and keyed OEM Duramax crankshaft
• Wagler HD forged connecting rods
• 14mm Gorilla Girdle
• ARP main studs
• Industrial Injection keyed billet alternate firing camshaft
• ATI Super Damper
• Billet flexplate
• Pinned oil pump
• New water pump
• New oil pickup tube
• Stock oil pan

Not Included

• Additional assembly gaskets
• Oil cooler
• Fuel system components
• Turbocharger components
• Cylinder heads
• Injectors
• Engine accessories
• Break-in oil

Vehicle Fitment

2001–2004 GM Duramax LB7 6.6L

• Chevrolet Silverado 2500HD
• Chevrolet Silverado 3500HD
• GMC Sierra 2500HD
• GMC Sierra 3500HD

Why Choose the Industrial Injection Stage 2 Short Block?

• Built for high-horsepower street and competition applications
• Reinforced bottom end with forged rods and Gorilla Girdle
• Premium performance components throughout
• Precision balanced and blueprinted rotating assembly
• Billet alternate firing camshaft included
• Proven Industrial Injection engine-building expertise
• Designed to withstand extreme power levels and demanding conditions
• Thoroughly tested and quality inspected before shipment

Break-In Recommendation

For optimal engine break-in and long-term performance, Industrial Injection recommends using Driven Racing Oil (Joe Gibbs) Break-In Oil during the first 300–500 miles of operation. Break-in oil is not included with the engine.