Fits 2001-2010 Silverado/Sierra 2500HD and 3500 trucks.

For those who want to lift the front of their vehicles beyond the limits of the OE adjusters, this kit along with a set of the "green" torsion bar keys is the way to go. Included a pair of upper a-arms with ball joints, and a pair of shock extensions.

"Revised ball joint angle along with increased underside clearance in the doownstop area allow for extended downward wheel travel with this kit. I highly recommend the Bilstein shocks and pitman/idler support kits also listed on my site." -JK

Green keys are simply a replacement for the OE suspension keys which adjust the preload on the torsion bars for increased ride height. These keys have a revised "clocking" of the torsion bar index allowing for a higher ride height setting.

"Keys do not affect the ride quality of the vehicle. What affects the ride quality is the amount of preload adjustment placed on the torsion bars. Since the green keys allow for more preload (increased ride height) the ride will be firmer if the ride height is increased. I highly recommend a fresh pitman and idler arm along with the pitman/idler supports listed here under steering." - JK