Superior 18-1201 Spring Booster, 2-pk

The Superior 18-1201 Spring Booster, 2-pk, provides a heavy-duty solution for adjusting coil springs. With no special tools required, these metal spring boosters can spread coils apart or tighten coils together. Simply place a booster on each end of the coil spring and tighten the center bolt to achieve the desired tension adjustment. For best results, use two spring locks per coil. Re-check installation after 400 km. The 18-1201 kit contains two up/down coil spring locks to optimize suspension performance.