1987 Pontiac Bonneville Helper Springs
- Firestone Suspension®Coil-Rite™ Rear Air Helper Spring KitPontiac Bonneville 1987, Coil-Rite™ Rear Air Helper Spring Kit by Firestone Suspension®. Mount inside an existing open coil spring suspension. These air springs provide adjustable spring rates far superior to the standard coil spring....Control the air pressure in the air helper springs for varying loads and road conditionsSpring performance can be altered as easily as inflating a tire$144.12
1987 Pontiac Bonneville Models