Air helper springs bag kit with 4 ply bags no drill kit for 2011-17 silverado sierra 8 lug truck. 2 – Heavy Duty, 4 Ply 2500lb Air Springs (Titan IV Series By airmaxxx). Set Mounting Brackets With Hardware. Manual Fill Kit with Air Hose and Fittings. Will Not Fit Trucks With Rear Sway Bar. Provides Up To 5000lbs Of Leveling Capacity. Want to upgrade your kit? Adds compressor and/or tank with control from inside your cab. Never exceed more than truck manufacturers maximum load recommendations.