When raising a leaf front & rear spring hilux, a Roadsafe Torque Arm should be installed. Basically the torque arm acts as a diff locater, and adjusts the location of the diff to prevent preloading of the front suspension. Using the standard torque arm on a raised Hilux will constrict the front suspension. The Roadsafe Torque Arm comes complete with high flex rubber bushings for maximum articulation, and on-car adjustability to suit heigts up to 3" lift. Heavy Duty Adjustable Torque Arm compatible with Toyota Hilux