01-04.5 Duramax LB7

The LB7 Duramax was first introduced in 2001 and produced until 2004. The 32 valve, V8 design utilizes a high pressure common rail direct injection system. Due to the lack of emission equipment, the LB7 is considered one of the most sought after Duramax's built, obtaining the best fuel mileage and having the simplest design.

Years Produced 2001 - 2004.5
Displacement 402 cubic inches, 6.6 liters
Configuration 90 degree V8
Compression Ratio 17.5:1
Bore 4.06 inches
Stroke 3.90 inches
Aspiration • Turbocharger
• air to air intercooler
• Maximum boost: 20 psi
Valvetrain OHV, 4 valves per cylinder
Injection • Direct injection
• Bosch high pressure common rail, CP3 injection pump
• 23,000 psi max injection pressure
Horsepower • 235 hp @ 2,700 RPM (2001)
• 300 hp @ 3,100 RPM (2004)
Torque • 500 lb-ft @ 1,600 RPM (2001)
• 520 lb-ft @ 1,800 RPM(2004)
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Cognito Stage 1 4-6" Lift Kit (with Bilstein Shocks) 2001-2010 Duramax 6.6L

Chevy and GMC 4-6 Inch non-torsion bar drop Lift Kit Package- 2001-2010 4WD Diesel or Gas engine 3..

$2,305.00

Cognito Stage 1 4-6" Lift Kit (with Bilstein Shocks) 2001-2010 Duramax 6.6L

Chevy and GMC 4-6 Inch non-torsion bar drop Lift Kit Package- 2001-2010 4WD Diesel or Gas engine 1..

$2,500.00

Cognito Stage 1 7-9" Lift Kit (with Bilstein Shocks) 2001-2010 Duramax 6.6L

Chevy and GMC 7 Inch Lift Kit Package- 2001-2010 4WD Diesel or Gas engine 1500HD, 2500HD, 3500HD, ..

$2,580.00

Cognito Stage 1 Leveling Kit (with Fox Shocks) 2001-2010 Duramax 6.6L

Cognito Stage 1 leveling kit with torsion bar keys, front and rear Fox monotube shocks..

$618.80

Cognito Stage 2 Leveling Kit 2001-2010 Duramax 6.6L

Cognito Stage 2 leveling kit, 2001-2010 2 and 4 WD Chevy Silverado and GMC Sierra 2500HD, 3500HD, ..

$679.00

Cognito Stage 3 Leveling Kit (with Fox Shocks) 2001-2010 Duramax 6.6L

Cognito Stage 3 leveling kit with Upper control arms, torsion bar keys, front and rear Fox monotube ..

$1,158.80

Cognito Stage 4 Leveling Kit (with Fox Shocks) 2001-2010 Duramax 6.6L

Cognito Stage 4 leveling kit with Upper control arms, torsion bar keys, front and rear Fox monotub..

$1,398.80

Cognito Tubular Upper Control Arm Kit 2001-2010 Duramax 6.6L

Tubular Upper Control Arm kit - Ball joint style with dual shock mounts built in..

$569.00

Duramax Rear Engine Cover Coolant Blockoff

This replaces the OEM plate that is prone to leaking and failure...

$65.00

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