Fox 2.5 4-Tube Piggyback Bypass Shocks provide improved dampening and control over traditional shocks. 2.5 Fox Bypass Shocks reduce harshness by adding four external bypass tubes which allow free-flow around the piston. The Fox 2.5 4-Tube Bypass Shocks feature two compression tubes and two rebound tubes for control in both directions and a smoother transition into the bump zone. The 2.5 Fox Piggyback Bypass Shocks provide a nice package for easier than other reservoir configurations. Upgrade to pre-tuned Fox 2.5 Bypass Shocks from AccuTune Off-Road today.