The Firestone 2176 Ride-Rite Air Helper Spring Kit is a rear suspension assist system designed to mount between the frame and rear suspension of select Ford F-350, F-450 and similar chassis-cab trucks and GM C3500HD Wide Track models. It delivers adjustable support to maintain proper ride height, stabilize off-center loads, and prevent sag when hauling or towing heavy payloads.
Each kit includes double-convoluted commercial-grade rubber air springs, along with upper and lower steel brackets, air line, separate inflation valves, push-to-connect fittings, hardware, and instructions. It operates over a pressure range of approximately 5–100 psi, allowing you to dial in support as loads change. The design includes brackets engineered for a mostly no-drill install using factory holes where applicable.
In real-world use this kit improves ride quality by reducing leaf-spring inter-leaf friction, decreasing axle-to-frame harsh contact, preventing bottoming-out, leveling headlight aim when loaded, protecting tires from uneven wear, enhancing braking and steering under load, and extending suspension life through reduced stress.