Hallman Pro Boost Controller (High-Boost 15+ PSI) Tilton these helper springs are specifically
Yard notes & kiln story
Description
Hallman Pro Boost Controller (High Boost 15+ PSI) Tilton these helper springs are specifically these helper springs are specifically designed to have a minimal effect on the spring rate of the main coilover spring Helper springs allow the spring to stay mounted on the coilover perch when the shock is under negative or zero load