QA1 Suspension System R140-170S

Upgrade the rear suspension of your 1988-1998 Chevrolet C1500 OBS truck with a complete QA1 Rear Suspension System, paired with a standard-width 9-inch housing and 31-spline axles. This system combines adjustable coil-over performance with straightforward wheel and tire fitment. The standard-width housing maintains the factory 65" wheel mounting surface width, making it easy to build around common wheel and tire combinations while maintaining the factory rear track width. FACTORY WIDTH FOR EASY WHEEL FITMENT The included 9-inch housing features a 65" wheel mounting surface width that matches the factory width. This makes wheel and tire selection more straightforward while maintaining the track width your OBS was originally designed around. The housing includes 31-spline axles, Big Ford New Style Torino housing ends with a 2.5" axle offset and dual 5x4.75" and 5x5" bolt patterns for compatibility with a wide range of brake and wheel combinations. MODERN COIL-OVER PERFORMANCE Replace the factory rear suspension with a performance-focused coil-over system designed to improve suspension control and give your OBS truck a more responsive, modern driving experience. DIAL IN YOUR RIDE QA1 single-adjustable coil-overs provide 18 positions of simultaneous compression and rebound adjustment. Turn the knob softer for comfortable street driving or increase the valving for more responsive handling. The included 170 lb/in. springs are a great choice for street-driven trucks, providing a balance of ride quality and performance. COMPLETE SYSTEM WITH 9-INCH HOUSING Get the suspension and rear-end components you need in one matched package. The system combines QA1 rear suspension components, single-adjustable coil-overs, 170 lb/in. springs, a standard-width 9-inch housing and 31-spline axles to simplify your build. 

• Easy wheel and tire fitment: Standard 65" wheel mounting surface width maintains the factory rear track width.
• Modernize your OBS suspension: Coil-over suspension provides greater suspension control and a more performance-focused driving experience.
• Tune the ride to your preference: Single-adjustable coil-overs provide 18 positions of adjustment for comfortable cruising or more responsive handling.
• Build around your preferred wheels and brakes: Dual 5x4.75" and 5x5" bolt patterns and Big Ford New Style Torino housing ends provide compatibility with a wide range of combinations.
• Start with a complete, matched system: Suspension components, coil-overs, standard-width 9-inch housing and 31-spline axles are packaged together to simplify your build.
• Performance you can count on: QA1 shocks are 100% dyno tested and serialized.