QA1 Suspension System R246-200S

Upgrade the rear suspension of your 1999-2006 Chevrolet Silverado with a complete QA1 Rear Suspension System, paired with a standard-width 9-inch housing and 31-spline axles. Designed for long-bed trucks, this system combines double-adjustable coil-over performance with straightforward wheel and tire fitment. The standard-width housing maintains the factory 68-1/4" wheel mounting surface width, making it easy to build around common wheel and tire combinations without narrowing the rear end. FACTORY WIDTH FOR EASY WHEEL FITMENT The included 9-inch housing features a 68-1/4" wheel mounting surface width that matches the factory width. This makes wheel and tire selection more straightforward while maintaining the factory rear track width. The housing includes 31-spline axles, Big Ford New Style Torino housing ends and the factory 6x5.5" bolt pattern 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 NBS a more responsive, modern driving experience. DOUBLE-ADJUSTABLE COIL-OVERS QA1 double-adjustable shocks let you independently tune compression and rebound, giving you greater control over how your truck responds to different road conditions and driving styles. With 18 positions of adjustment for each, you can fine-tune ride quality, handling and traction for street driving or more performance-focused use. The included 200 lb/in. springs provide a balanced spring rate for street-driven performance trucks. 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, double-adjustable coil-overs, 200 lb/in. springs, a standard-width 9-inch housing and 31-spline axles to simplify your build. 

• Easy wheel and tire fitment: Standard 68-1/4" wheel mounting surface width maintains the factory rear track width.
• Modernize rear suspension performance: Coil-over suspension provides greater suspension control and a more performance-focused driving experience.
• Fine-tune ride and handling: Double-adjustable coil-overs provide independent compression and rebound adjustment for greater control over suspension behavior.
• Build around your preferred wheels and brakes: Factory 6x5.5" bolt pattern 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.