4.0 diameter bypass shocks provide additional damping and cooling capabilities over smaller options Now available, the FOX 4.0 Factory Series Bypass shock is the ideal position-sensitive shock for lightweight unlimited offroad racecars and pre-runners. Bypass shocks allow precise adjustment of multiple stages of compression and rebound damping. The 4.0 Factory Series Bypass shock adds another competitive option… Continue reading FOX 4.0 Factory Series Bypass Now Available