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The Firestone Coil-Rite front air helper spring kit for 2005–2018 Ford F-250/F-350 4WD installs inside the front coil springs to add adjustable air assistance for heavy loads. The kit includes air helper springs, supports, hardware, air line and inflation valves and is supplied for 4WD applications with no drilling required. It helps keep headlights aimed, enhances braking and steering balance, and resists bottoming out.
Firestone Coil-Rite Air Helper Spring Kit Front 05-18 Ford F250/F350 (4WD Only) (W237604160)
