Performance primary drive compensator replacement spring. Thicker, stronger and an increased bevel over stock. Features a steeper bevel that provides more preload and pressure on the spring pack and compensator. This helps diminish excessive compensator travel in turn reducing harmonics, eases start up and gives a more responsive feel at lower engine RPMs. Replaces the first, outer most spring in OEM spring pack 83936-09A
Fits: > 99-17 Twin Cam, 17-25 M8.