04.5-06 Duramax LLY

The Duramax LLY was introduced in 2004 to replace the popular LB7. Like the LB7, the LLY utilizes a high pressure common rail direct injection system. The LLY was General Motors' first attemp at implementing emission controls on a diesel engine to meet stricter emissions requirements in the future. The LLY adopted a variable geometry turbocharger (VGT) and exhaust gas recirculation (EGR) system to help reduce emissions. Huge changes to the LLY debuted in 2006, but the engines were mechanically identical.

Years Produced 2004.5 - 2006
Displacement 403 cubic inches, 6.6 liters
Configuration 90 degree V8
Compression Ratio 17.5:1 (16.8:1 in 2006)
Bore 4.06 inches
Stroke 3.90 inches
Aspiration • Garrett variable geometry turbocharger (VGT)
• air to air intercooler
Valvetrain OHV, 4 valves per cylinder
Injection • Direct injection
• Bosch high pressure common rail, CP3 injection pump
• 23,000 psi max injection pressure
Horsepower • 310 hp @ 3,000 RPM
• 310 hp @ 3,000 RPM (2006)
Torque • 520 lb-ft @ 1,600 RPM
• 605 lb-ft @ 1,600 RPM (2006)
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ATLAS 4" Down-Pipe Back Aluminized Steel Exhaust Race System 2001-2005 GM 6.6L Duramax

The ATLAS exhaust is engineered to perform in the most extreme environments. This system is constr..

$364.00

ATLAS 4" Down-Pipe Back Aluminized Steel Exhaust Race System 2001-2007 GM 6.6L Duramax

The ATLAS exhaust is engineered to perform in the most extreme environments. This system is constr..

$395.00

ATLAS 5" Down-Pipe Back Aluminized Steel Exhaust Race System 2001-2007 GM 6.6L Duramax

A 5" from the down-pipe back, the ATLAS exhaust is engineered to perform in the most extreme envir..

$522.00

Carrillo GM Duramax Diesel Performance Connecting Rod Set

If you are looking for the ultimate Duramax Diesel connecting rod, than these Carrillo connecting ..

$2,642.00

Cognito 60" Custom Traction Bar Kit 2001-2010 Duramax 6.6L

Traction Bar Kit, Custom 60 inch - 2001-2010 Chevy/GMC 2/4WD 2500HD/3500HD trucks & 2500 SUV ..

$799.00

Cognito Alloy Series Tie Rod Kit 2001-2010 Duramax 6.6L

Alloy Series Tie Rod Kit - 2001-2010 Chevy/GM 2/4WD 2500HD/3500HD trucks & 2500 SUV/H2. 5 year..

$329.00

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

Boxed Upper Control Arm kit - Ball joint style, no dual shock mounts. Must use the correct shock f..

$540.00

Cognito Economy Traction Bar Kit 2001-2010 Duramax 6.6L

TBKE50 - 50 inch Traction Bar, Truck Only OR TBKE60 - 60 inch Traction Bar, Truck & SUV..

$429.00

Cognito Economy Traction Bar Kit 2001-2010 Duramax 6.6L

TBKE50 - 50 inch Traction Bar, Truck Only OR TBKE60 - 60 inch Traction Bar, Truck & SUV..

$429.00

Cognito Heim Joint Tie Rod Kit (After Market Spindles) 2001-2010 Duramax 6.6L

Heim Joint Tie Rod Kit (After Market Spindles) - 2001-2010 Chevy/GM 2/4WD 2500HD/3500HD trucks &am..

$475.00

Cognito Heim Joint Tie Rod Kit (OEM Spindles) 2001-2010 Duramax 6.6L

Heim Joint Tie Rod Kit (OEM Spindles) - 2001-2010 Chevy/GM 2/4WD 2500HD/3500HD trucks & 2500 S..

$475.00

Cognito Idler Pivot W/ Gusset Kit 2001-2010 Duramax 6.6L

Idler Pivot Assembly w/ weld in Gusset - 2001-2010 Chevy/GMC 2/4WD 2500HD/3500HD trucks & 2500 S..

$220.00

Cognito Pitman & Idler Support Kit 2001-2010 Duramax 6.6L

Pitman & Idler Arm Support kit - 2001-2010 Chevy/GMC 2/4WD 2500HD/3500HD trucks & 2500 SUV..

$240.00

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

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