Chris Alston’s Chassisworks – Independent Rear Suspension

gStreet Independent Rear Suspensions for Muscle Cars

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.

2017 - alston irs

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.

2017 - alston irs 2

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.

2017 - alston irs coilover
2017 - alston irs rocker-arm

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.

Chassisworks gStreet


Chris Alston Chassisworks logo


Chris Alston Chassisworks





(916) 388-0288


8661 Younger Creek Drive

Sacramento, CA 95828

ABOUT Chris Alston Chassisworks

Chris Alston created his first chassis kits in the mid 1970s and went on to build Chris Alston's Chassisworks in 1987. Through continual reinvestment and development Chassisworks now manufactures in-house over 10,000 separate components and assemblies that make up its six separate product brands. Their state-of-the-art manufacturing facility and strict quality control standards provide some of the finest chassis, suspension, and engine accessory products in the industry at extremely competitive prices.