Coil-Rite Rear Air Spring Kit for Toyota 4Runner (1998–2024)

The Firestone Coil-Rite Rear Air Spring Kit gives Toyota 4Runner owners a practical way to adjust rear suspension support as vehicle loads change. Whether carrying passengers, loading up for a trip, or transporting additional equipment, the system helps maintain a more balanced stance while improving handling and braking performance.

The air springs install in the existing rear coil springs and provide support as air pressure increases, creating a variable spring rate that responds to the vehicle’s load, delivering firmer suspension support when carrying heavier cargo.

Separate inflation valves let each air spring be adjusted independently, making it easy to tailor suspension support to changing weight, road conditions, and driving requirements without relying on an onboard compressor or electronics.

Added support helps the 4Runner maintain a more level stance under load. By reducing excessive sag, the system improves handling, braking response, and overall control, including when driving on uneven roads or in adverse conditions.

The variable spring rate lets the suspension respond differently depending on the vehicle's load. Increased support under heavier conditions helps provide a steadier ride, while lower pressure allows a more compliant response.