QA1 Coilover Overhaul Kit R122-170QA1's unique torque arm design maximizes performance without the inherent binding issues of other systems, all while achieving a 4" to 7" drop. This bolt in system also offers incomparable adjustability: the watts link, torque arm, trailing arms, bracket mounts, and shocks are all adjustable. Single adjustable shocks are perfect for street driven trucks that see occasional time on the track. With a simple turn of the adjustment knob, you can cruise