Airmaxxx Air Assist Load Leveler Kit For Heavy Hauling with On Board Air Management 1/4 Valves. Kit Includes: 2 – Standard 2500lb Air Bag Springs Set Mounting Brackets With Hardware AM400 Pewter Air Compressor 1/4″ Stainless Steel Braided Leader Hose 1/4″npt Check Valve 2 – 1/4npt Brass Air Valves Premium 40 Amp Relay 15′ Roll of 1/4 Air Hose 200 PSI Single Needle Air Gauge with Mounting Bracket Air Hose Fitting Kit 12 Volt Electric Valve Control Switch 3 Gallon 6 Port Steel Air Tank 1/4 Drain Valve. Fits: 2001 – 2010 Chevy/GMC Trucks With 8 Lug Wheels will not fit trucks with rear sway bar. Replaces Factory Bumpstops Provides Up To 5000lbs Of Leveling Capacity. Want to upgrade your kit? AirMaxxx Tow Assist Convenience Package in Cab Air Control on Board Air Management. Allows in-cab air pressure control to your tow helper/load assist kit or single zone air bag system. Durable compressor included quickly fills air directly to bags with a simple push of a switch. Have a train horn? This kit will include what you need to plumb it in as well. Need to fill a tire or run an air tool? This kit will do just that. No specialty tools are required for install. Never exceed more than truck manufacturers maximum load recommendations.