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The Timbren Suspension Enhancement System for 2004 Ford F-150 STX 4WD rear suspension uses hollow rubber springs to absorb bumps, eliminate rear sag, and improve handling while towing or carrying heavy loads. Rated at 6000 lbs, the bolt-on kit installs quickly with basic hand tools and requires no airlines or fittings. Its progressive spring rate adjusts automatically to added weight for better stability and ride quality.
Timbren 2004 Ford F-150 STX 4WD Rear Suspension Enhancement System
