QA1 GS501-10650C GM Pro-Coil Front Coilover System Single Adjustable 10in 650lb/in

The QA1 GS501-10650C is a front Pro-Coil coilover shock system designed for GM muscle car applications, delivering a significant upgrade in stance, ride quality, and suspension tunability over factory setups. This single-adjustable kit features lightweight billet aluminum shocks paired with high-travel USA-made coil springs, offering a bolt-in installation that works with both OE stamped steel control arms and QA1 tubular control arms.

Ride Height and Valving Adjustment:

The fully threaded shock body allows up to 2 inches of downward ride height adjustment, letting you dial in the perfect stance with a simple turn of the spring seat nut. The 18-position single-adjustable damping knob provides simultaneous rebound and compression adjustment, allowing you to tune between a comfortable street ride and a more aggressive performance feel. The adjustment knob is easily accessible at the base of the shock by turning the steering wheel to full lock.

Key Features:

• Single Adjustable: 18-position simultaneous rebound and compression damping adjustment
• Billet Aluminum Shocks: Lightweight construction reduces unsprung mass for improved suspension response
• 10-Inch High-Travel Springs: 650 lb/in rate; USA-made with fewer coils and smaller wire diameter for greater usable travel
• Spring End Style: Large tapered flat upper end (10HTBF650)
• Ride Height Adjustment: 0 to -2 inches of adjustability
• Compressed Length: 10.13 inches | Extended Length: 17 inches
• Bolt-In Installation: Compatible with OE stamped steel or QA1 tubular control arms
• 100% Dyno Tested and Serialized
• Serviceable and Rebuildable by QA1 Authorized Service Centers
• Made in the USA
• Sold as a pair (2 shocks + 2 springs + all mounting hardware)

QA1's Pro-Coil high-travel springs are engineered with a smaller wire diameter and reduced coil count compared to conventional springs of the same rate, resulting in more usable stroke and lower unsprung weight. This system is suited for a wide range of driving applications including street performance, autocross, road racing, and street rod builds. Backed by a 1-year manufacturer warranty against defects in materials and workmanship.