TufShafts are a direct replacement upgrade shafts for any 2001-2010 GM 2500-3500 with a 9.25? AAM front axle. They are designed to eliminate the stock passenger side split axle shaft that is prone to breaking under high torque situations, as well as the short drive side axle shaft that is prone to breaking under high torque situations as well. The TufShafts are made from high strength HyTuf material for maximum strength and reliability.