Difference between the Raybestos Powertrain TorqKit and Zpak

A TorqKit is designed to increase the capacity of the clutch pack, usually involving adding friction plates and other components as well. Engineered to withstand high-stress diesel or towing with increased horsepower and torque beyond OE specification, the TorqKit increases durability, and improves clutch life.The Raybestos Powertrain ZPak is a single-sided clutch system developed to overcome design flaws to deliver increased torque capacity, reduce stress and core temperatures, and eliminate high-stress coning. While both innovative products are designed to increase torque capacity, the difference is that the ZPak allows for a cooler temperature during clutch apply to help reduce the propensity for hot spotting on steel plates.