Cyclone Diesel Performance Diesel Performance Parts

GMC Duramax Diesel Performance Parts

If your a GMC fan we can get what you want at a price you will like! Below you will find a few of our featured GMC high performance parts for your diesel truck. We can special order just about anything! Call us at 1-800-697-0194.

The Duramax engine is fitted with the Bosch common rail diesel injection system which has been available in Europe for some time. This system allows very precise control over fuel injection quantity and timing. These factors are critical to diesel engine performance including refinement and emissions as well as power and torque output.

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    Sierra 2500HD 99/08 Front Leveling Suspension - Forged Torsion K
Sierra 2500HD 99/08 Front Leveling Suspension - Forged Torsion K
Sierra 2500HD 99/08 Front Leveling Suspension - Forged Torsion K
Part #: 66-3050
Our Price: $229.95

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Sierra Suspension Leveling Kit: 3500 SINGLE/DUALLY, 1999-2008, 1500/2500HD,

2WD & 4WD - 8 LUG

 Max Lift 2.50 in. - Max Tire Diameter 33 in.

ReadyLift® leveling kits are the fastest, safest, least expensive way to bring the front of your Sierra level with the rear. Our torsion keys are designed to grab the “FLAT” of the torsion bar for a tighter, sturdier fit. CNC machined adjuster bolt pockets and 10.9 grade metric hardware allow for proper bolt seating, ensuring an accurate and safe adjustment. Only ReadyLift® torsion keys are forged, making them 25% stronger than OEM and primed to last the life of your vehicle.

The adjustable 66-3050 torsion key provides 1.5” to 2.5” of lift and gives clearance to add up to 33" wheels and tires to the Sierra. ReadyLift® keys are guaranteed never to affect the OEM ride and will not add more pressure on the stock suspension components. Through our innovative engineering, ReadyLift® kits cost thousands less than a traditional lift kit and install in about an hour.

ReadyLift Lifetime Warranty Included! All ReadyLift® products are backed by a lifetime warranty for as long as you own your vehicle and includes all necessary parts, hardware, detailed installation instructions, and two color decals.

ReadyLift™ Features

  • Keeps your factory ride - Guaranteed
  • Will never wear, break or fail - Guaranteed
  • Toughest finish – Guaranteed
  • Safest way to level lift - Guaranteed


    ReadyLift™ Torsion Key
  • Forged for ultimate strength
  • Safely raises trucks 1.5 to 2.5 inches
  • Does not "over crank" torsion bar


    Includes Shock Extension Brackets

    • 66-3050 - Custom torsion key adjusting bolts are included that prevent the installer from over-cranking the torsion key, which affects ride. The kit may be dialed up with the stock adjusting bolts, but which may also affect ride quality
    • 66-3050 - A heavy duty shock extension bracket replaces the OEM bracket to keep the correct piston travel on the already short stock shock.
  • Prices are subject to change without notice.
    Cyclone Diesel Performance Parts

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    Cyclone Diesel Performance
    Last modified: 07/12/2012