Firestone 4100 – Coil Rite Air Helper Spring Kit

Coil-Rite air helper springs mount inside an existing open coil spring suspension. These air springs provide adjustable spring rates far superior to the standard coil spring. The durable polyurethane air springs will support 230-450kg per set. Coil-Rite air helper springs are made of durable polyurethane to withstand the rigours of coil-sprung suspensions. Each air spring is pressure tested before leaving the factory. Over 1/2 million cycle life test. The Kit includes air springs air line fasteners inflation valves manual inflation supports if required push-to-connect air fittings and detailed instructions.