Air helper springs bag kit with 4 ply bags no drill kit for 2001-10 silverado sierra 8 lug truck. Kit Includes: Two – Heavy Duty, 4 Ply 2500lb Air Springs (Titan IV Series By airmaxxx) Bag Mounting Brackets With Hardware 1/4 D. Approved Air Line With Fittings And Schrader Valve. Bag Brackets Directly Bolt Into Factory Holes (only one small hole needs to be drilled for air fill schrader 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 1 & 3/4 Ton Trucks With 8 Lug Wheels Will Not Fit Trucks With Rear Sway Bar. Never exceed more than truck manufacturers maximum load recommendations. Want to upgrade your kit? Adds compressor and/or tank with control from inside your cab.