Pacbrake HP10002 Rear Air Suspension Kit The strongest air springs on the market for 2003-2012 Dodge Ram 2500/3500 4WD trucks Fits with the 3349 & 3319 SuperGlide 5th wheel rail kits on 2WD vehicles 2007-2013 Dodge Ram 3500 (Chassis Cab) 2WD/4WD vehicles require an HP10136** No drilling, easy installation Lifetime Warranty