The HP10002 Kits fit with the 3349 and 3319 super glide 5th wheel rail kits on 4WD vehicles. For Dodge RAM 3500 (2WD/4WD) Chassis Cab, the HP10136 must be purchased for vehicles that have a round axle tube with the breather located approximately 7'' from the spring pack. Use the strongest air springs on the market to eliminate your vehicle’s sag, sway and bottoming out. Distribute weight evenly to your tires, supporting any load without overtaxing your suspension. AMP airbags by Pacbrake are the only heavy-duty airbags on the market with one-piece aluminum end caps and 20 support wires giving you maximum strength and durability! AMP: The number one solution to level your truck’s stance while providing added support for an overall smoother, safer ride.