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Firestone Coil‑Rite rear air helper spring kit for Toyota 4Runner (1998–2017) installs inside the vehicle's coil springs to provide a controllable variable spring rate, allowing you to adjust ride height and stiffness by changing air pressure. Polyurethane air springs support 500–1,000 lbs per set and operate across a broad temperature range. The kit includes supports, hardware, air line and inflation valves with no drilling required to help maintain level stance and reduce tire wear.
Firestone Coil-Rite Air Helper Spring Kit Rear 98-17 Toyota 4Runner (W237604135)
