Firestone 4148 Coil-Rite Air Helper Spring Kit for Coil Suspension

The Firestone Coil-Rite Air Helper Spring Kit is engineered to enhance the ride quality and load-handling capabilities of vehicles equipped with coil spring suspension. Designed to fit inside your existing coil springs, this innovative air helper spring system creates a variable spring rate that adapts to your driving needs.

Key Features:

• Installs inside existing coil springs to provide adjustable load support
• Levels your vehicle under load for improved handling and braking performance
• Adjustable air pressure allows on-the-fly tuning for varying loads and road conditions
• Constructed from durable, elastic polyurethane for long-lasting performance
• Supports 500-1,000 lbs. per set without exceeding vehicle GVWR
• Operates reliably in extreme temperatures from -40°F to 180°F
• Easy adjustment—simply inflate or deflate like a tire to change spring performance

Whether you're hauling cargo, towing a trailer, or dealing with challenging road conditions, the Firestone Coil-Rite system provides the stability and control you need. The adjustable air pressure feature eliminates the need for multiple spring setups, giving you a versatile suspension solution that adapts to your vehicle's changing demands. This kit delivers years of improved comfort, safety, and vehicle stability.