The Timbren Suspension Enhancement System for 2004 Ford F-150 STX RWD rear suspension adds hollow rubber springs to reduce rear sag and cushion road shocks when hauling. Rated at 6000 lbs, the kit bolts on without drilling or airlines and installs with basic hand tools. The progressive rubber springs adjust to load, improving stability, reducing body roll and helping maintain a more consistent ride whether the bed is empty or loaded.
Timbren 2004 Ford F-150 STX RWD Rear Suspension Enhancement System