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This is the Firestone Ride-Rite Air Helper Spring Kit Model 2478, designed for the rear axle of Dodge/RAM 3500HD Cab & Chassis trucks (both 2-wheel drive and 4-wheel drive) from model years 2007 through 2026. It includes two heavy-duty convoluted air springs, mounting brackets, hardware, air lines, and separate inflation valves for manual control. When installed, it mounts between the vehicle’s frame and suspension to correct sagging and improve performance when carrying heavy or off-center loads.
The Ride-Rite 2478 is built with rugged materials, featuring steel brackets and reinforced hardware to withstand heavy duty use. The air springs are designed for continuous use from 5 to 100 PSI air pressure, enabling real adjustment to match varying loads. The convoluted spring bags are durable and process high pressures, helping resist fatigue and deformation over time. The finish is corrosion-resistant, and it includes all necessary parts for complete installation.
In real-world use, this kit raises towing safety, provides greater stability when hauling, smooths ride quality by reducing interleaƒ friction, and helps maintain proper handling and braking under load. Whether loaded with cargo, towing, or navigating rough roads, it keeps your Ram 3500HD level, protecting tires and brakes, preventing bottoming out, and improving driver confidence. It’s ideal for users who regularly haul heavy or uneven loads and need consistent control and comfort.