2001-2004 6.6L LB7 Duramax Race Long Block - Industrial Injection
2001-2004 6.6L LB7 Duramax Race Long Block - Industrial Injection
6.6L Duramax 130lb. Valve Spring Kit - Industrial Injection
Industrial Injection LML Duramax Ported & Polished Cylinder Heads - Industrial Injection
2001-2004 6.6L LB7 Duramax Race Long Block - Industrial Injection
2001-2004 6.6L LB7 Duramax Race Long Block - Industrial Injection
6.6L Duramax 130lb. Valve Spring Kit - Industrial Injection
Industrial Injection LML Duramax Ported & Polished Cylinder Heads - Industrial Injection

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

Industrial Injection SKU: PDM-LB7RLB
Price
Regular price $30,29995
Regular price $000 Sale price $30,29995
Save $-30,299.95
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Premium Freight Program: $500 flat-rate freight each way via Old Dominion. Core support available.
Shipping calculated at checkout.
Industrial Injection Premium Freight Program

Premium Freight Coordination

Qualifying stocked engines ship through our coordinated flat-rate freight program with Old Dominion.

✓ $500 flat-rate freight each way
✓ Handled exclusively through Old Dominion
✓ Core return support available
✓ Questions? Call our engine team
Premium Diesel Components, Delivered with Confidence.

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

Take your 2001–2004 LB7 Duramax to the next level with the Industrial Injection Stage 2 Long Block Engine. 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 Long Block is precision machined, balanced, blueprinted, and assembled using premium performance components. Combined with Industrial Injection's fully CNC Ported & Polished Cylinder Heads featuring Torque Lock Injector Cups, this engine is engineered to maximize airflow, increase horsepower potential, and eliminate one of the most common LB7 cylinder head failure points.

Key Features

Engine 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

Cylinder Head Features

  • Fully CNC ported and polished cylinder heads
  • Precision machined using a 5-axis CNC cylinder head porting machine
  • CAD/CAM software-developed port design
  • Industrial Injection Torque Lock Injector Cups installed
  • Diamond honed valve guides
  • Unshrouded valves for increased airflow
  • High-strength alloy, heat-treated iron-based valve guides
  • Premium nickel-based, non-magnetic valve seat inserts
  • Multi-angle valve job
  • 130 lb valve springs installed
  • Fully assembled and ready for performance use

Stage 2 Performance Engine Construction

The Industrial Injection Stage 2 Long 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 horsepower and competition use.

The included Ported & Polished Cylinder Heads are CNC machined using Industrial Injection's advanced 5-axis porting technology. This process dramatically improves airflow consistency and cylinder filling, helping support increased horsepower, improved throttle response, and greater overall engine efficiency.

Exclusive to the LB7 platform, these heads feature Industrial Injection Torque Lock Injector Cups. Unlike factory press-fit injector cups, Torque Lock cups are mechanically secured into the cylinder head to prevent movement under extreme cylinder pressure and heat. This proven upgrade helps eliminate common LB7 injector cup failures, reducing the risk of coolant intrusion, combustion leaks, injector sealing issues, and costly engine damage.

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 long block
  • CNC Ported & Polished cylinder heads
  • Industrial Injection Torque Lock Injector Cups
  • 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
  • 130 lb valve springs

Not Included

  • Additional assembly gaskets
  • Fuel system components
  • Turbocharger components
  • Injectors
  • Exhaust manifolds
  • 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 Long Block?

  • Built for high-horsepower street and competition applications
  • Fully CNC Ported & Polished cylinder heads included
  • Exclusive Torque Lock Injector Cup upgrade for LB7 applications
  • Eliminates common LB7 injector cup failures
  • Reinforced bottom end with forged rods and Gorilla Girdle
  • Premium performance components throughout
  • Precision balanced and blueprinted rotating assembly
  • Billet alternate firing camshaft included
  • Increased airflow and horsepower potential
  • 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.
Shipping information

Free economy ground shipping on most orders over $200. This includes lower 48 United States only. Excludes products that must ship freight.

Core Return Info

Read Carefully!

When you purchase a product from our website that has a core requirement, you have two options:

1. You choose to pay the core charge and we will ship the product right away, then once we receive the cores you will be refunded the core charge if your cores pass our inspection qualifications. This is the preferred choice and has the least delays. 

2. You choose to send in your cores before we ship the product that was purchased. This choice has the risk of delayed shipment of your purchased product and our inventory is not guaranteed by the time we receive your cores. You will need to follow all of the instructions below as quickly as possible so that you can get your purchased product and we can receive the cores. When you choose this option you acknowledge that by the time we receive your cores, our inventory could have change and there could be a delay in your shipment. 

 

Please return all cores to:



Industrial Injection Core Returns
2858 South 300 West
Salt Lake City, Utah 84115

INCLUDE RA# THAT WAS ISSUED AT TIME OF PURCHASE! If RA # is lost, please call Customer Service at (800) 955-0476. Have your original invoice at time of phone call to give all appropriate information for return.

Core return freight is the responsibility of the customer

FULL CREDIT WILL BE GIVEN WHEN: 

In order to receive full core credit, your core(s) must be returned within 90 days from receipt of order. It must be as is “off the engine.” Full core credit will be given if core meets acceptance criteria. Cores that are damaged during shipment to Industrial Injection are the responsibility of the customer and their shipping company.

½ CORE CHARGE CREDIT WILL BE GIVEN WHEN:

  • Slightly damaged housing or camshaft
  • Missing parts such as FCA

No Core Credit issued when:

  • Core is seized or hydraulic head is cracked
  • Excessive damage ( Heavy use of Bio-diesel and rust are common causes for unacceptable core)
  • Core is fire damaged
  • Core is returned after 90 days/3months

Please do the following when returning a core:

  • Make sure you have removed all fittings from your old unit
  • Drain all fuel and oil from unit
  • Package cores so that fuel and oil does not escape from the package

NOTE: packages that have fuel or oil residue on the outside of the box during shipping will not be delivered by UPS or the postal service which will cause delays.

  • Please re-use boxes and bags that parts were shipped in originally. These boxes are UPS approved to reduce damage while being handled in freight.
  • All shipping charges are the responsibility of the customer
  • Please write on the box “Core Return” and have RA # clearly written on the outside of box
  • Include copy of original invoice and RGA inside box

PLEASE RETAIN RA#, INVOICE # AND TRACKING NUMBER UNTIL CREDIT IS RECEIVED BY YOU. We do not research by customer name, only invoice # or RA #.
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