2001-10 Chevy 2500 Towing Assist Over Load Air Suspension Kit
Kit Includes:
Two - Standard 2500lb Air Springs
Mounting Brackets With Hardware 
1/4" D.O.T. Approved Air Line With Fittings And Schrader Valve

Directly Bolts In To Factory Holes
(only one small hole needs to be drilled to place air fill valve)

Replaces Factory Bumpstops
Provides Up To 5000lbs Of Leveling Capacity*
Easily Add Or Remove Air Same As You Would A Tire

Fits:
2001 - 2010 Chevy/GMC 2500/2500HD Trucks With 8 Lug Wheels
Will Not Fit Trucks With Rear Sway Bar