Firestone 4175 Coil-Rite Air Helper Spring Kit Rear fits VW Passat Wagon / Jetta

The Firestone Coil-Rite Air Helper Spring Kit is a performance upgrade designed for vehicles with coil spring suspensions. It features air helper springs that fit inside existing coil springs to provide a variable spring rate, helping to level the vehicle and improve braking and handling under heavy loads or challenging road conditions. Constructed from durable, elastic polyurethane, these springs support 500-1000 lbs per set (not exceeding the vehicle's GVWR) and are engineered to operate effectively within temperatures ranging from -40°F to 180°F. The Coil-Rite system allows precise control of air pressure, enabling drivers to adjust ride firmness easily, similar to inflating a tire, for enhanced comfort and stability.

This kit is suitable for rear suspension applications on vehicles such as the VW Passat Wagon and Jetta, typically compatible with models equipped with coil spring suspensions. It is intended for use in daily driving, towing, or hauling scenarios where load leveling and improved ride quality are desired. Installation involves fitting the air springs inside the existing coil springs, making it a straightforward upgrade for compatible vehicles. The kit includes the necessary air springs and components to enable adjustable support, ensuring optimal handling and ride comfort under varying load conditions.