Firestone Coil-Rite Rear Air Helper Spring Kit for Select 2008-2014 Cadillac, Chevrolet & GMC (4186)

Fits select 2008-2014 Cadillac, Chevrolet, and GMC SUVs including Escalade, Suburban 1500/2500, Tahoe, and Yukon/Yukon XL models.

The Firestone Coil-Rite Air Helper Spring Kit is engineered to provide a smoother ride and better control for vehicles equipped with coil spring suspensions. These air springs fit directly inside your existing rear coil springs to create a variable spring rate, allowing you to level your vehicle when hauling heavy cargo or towing. By maintaining a level stance, you improve steering geometry, balance, and braking effectiveness while preventing the rear suspension from bottoming out under load.

Constructed from durable, elastic polyurethane, these helper springs are designed to withstand harsh road conditions and extreme temperature fluctuations. Performance is easily adjusted by varying the air pressure to suit different load conditions, much like inflating a tire. This kit helps reduce tire wear and ensures your headlights remain properly aimed at the road for safer nighttime driving.

• Manufacturer Part Number: 4186
• Position: Rear
• Support Capacity: 500–1,000 lbs. per set (Do not exceed vehicle GVWR)
• Material: High-strength polyurethane construction
• Temperature Rating: -40°F (-40°C) to 180°F (82°C)
• Adjustable variable spring rate for superior load leveling
• Includes all necessary components for installation