06-07 Duramax LBZ

The LBZ replaced the LLY late in the 2006 model year and production continued through 2007. A large bump in output was seen with the introduction of the LBZ. Mechanically, the LBZ is very similar to the 2006 LLY model. The most significant difference between the LLY and LBZ is the computer controls. The LBZ features a much "wilder" tune, giving it a large increase in power horsepower and torque output.

Years Produced 2006 - 2007.5
Displacement 403 cubic inches, 6.6 liters
Configuration 90 degree V8
Compression Ratio 16.8:1
Bore 4.06 inches
Stroke 3.90 inches
Aspiration • Variable geometry turbocharger (VGT)
• air to air intercooler
• 20 psi maximum boost pressure
Valvetrain OHV, 4 valves per cylinder
Injection • Direct injection, high pressure Bosch common rail injection system, CP3 injection pump
• Maximum 26,000 psi injection pressure
• Seven hole injectors
Horsepower 360 hp @ 3,200 RPM
Torque 650 lb-ft @ 1,600 RPM
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GM Allison LBZ and LMM Billet Flex Plate 2006-2010

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