Engineered and manufactured as a true high performance independent rear suspension, the Chassisworks gStreet IRS is an exceptionally capable system intended for the most demanding high horsepower, road handling applications.

Offered as a replacement back-half or full-chassis system, the gStreet IRS is based upon a robust, mandrel-bent 4×2” frame clip with fully-boxed 2×2” suspension mounting crossmembers and fabricated upper cradle.

The system features Chassisworks legendary FAB9 center section fitted with a series of six poly-bushing mounts to firmly hold the assembly, while reducing higher frequency vibration and road noise. The extremely stable center section and high-strength, 35-spline halfshaft assemblies are capable of dependably delivering over 1,500 horsepower. Two different suspension configurations are available; a traditional lower control arm mounted coilover and a rocker-arm-actuated, trunk-floor-mounted, coil-over for reduced unsprung weight and further enhanced road holding ability.

To ensure consistent and correct geometry during hard cornering and acceleration, all suspension mounts are tied directly to the frame through use of deflection-free spherical bearings. Chassisworks exclusive low-friction pivot-ball assemblies are used in their double-shear configuration at the control arm to chassis mounts and the lower arm to spindle, while a pivoting-stud configuration is integrated directly into the upper end of the billet-aluminum upright. Less demanding pivot points at the toe links and anti-roll bar end links use equally precise, but smaller Teflon-lined spherical rod ends.

Rear Frame Clip Assembly
Each frame clip is designed and manufactured with the intention of supporting extreme levels of acceleration, cornering and braking forces. The fully-boxed frame rails and crossmember, and broad fabricated upper cradle provide a durable, no-compromise structural platform. All components are manufactured using the latest CNC equipment and professionally welded by Chassisworks’ staff in a controlled environment using computer-designed fixtures and production-quality equipment.

Control-Arm-Mounted Coil-Over Frame Clips
Specific to the lower control arm mounted coil-over suspension, these frames feature a raised area along the inside of the frame rail, allowing additional height for the upper shock mount.

Rocker-Arm-Actuated Coil-Over Frame Clips
Relocating the shock absorbers into the trunk area requires a pass-through hole with bellow boot-seal mount as well as chassis mounts for the billet-aluminum suspension rocker and fixed end of the shock.

Chassisworks gStreet is the premier option when selecting an IRS system and is currently available in four hub-to-hub widths (54, 56, 58 and 60”) with vehicle-specific chassis and floor kits for ‘67-81 Camaros and ‘64-70 Mustangs. Custom-fit version also available for other vehicles.