Firestone Coil-Rite Front Air Helper Spring Kit for Select Chevrolet & GMC 1963-1999 (4100)

Fits select 1963-1999 Chevrolet and GMC C10/C20/C30, Suburban, Blazer/Jimmy, G-Series Vans, and P30 Chassis.

Firestone Coil-Rite air helper springs are designed to supplement your vehicle's existing coil spring suspension. By installing these durable polyurethane inserts inside your factory front coils, you create a variable spring rate that levels the vehicle under load and significantly improves handling. This kit allows you to adjust air pressure manually to compensate for varying loads, ensuring your headlights stay aimed at the road and your steering remains responsive.

Constructed from high-strength, elastic polyurethane, these air springs provide a maintenance-friendly solution to prevent bottoming out and reduce tire wear. They offer adjustable support from 500 to 1,000 lbs per set (not to exceed the vehicle's GVWR) and are engineered to perform in extreme conditions ranging from -40°F to 180°F.

• Variable Spring Rate: Adjust air pressure to match your specific load and road conditions.
• Leveling Support: Maintains proper ride height for better braking effectiveness and stability.
• Durable Construction: Made from elastic polyurethane for long-term comfort and stability.
• Operating Range: Rated for temperatures between -40°F (-40°C) and 180°F (82°C).
• Capacity: Supports 500-1,000 lbs per set.
• Part Number: 4100 (W237604100).