QA1 GS507-10650C GM Pro-Coil Front Coilover System Single Adjustable 10in 650lb/in

The QA1 GS507-10650C is a front Pro-Coil coilover conversion system built for GM full-size vehicles. This single-adjustable kit replaces the factory shocks and springs with a purpose-engineered coilover package that delivers fully adjustable ride height and damping control — straight from the factory mounting locations with no cutting or welding required.

At the heart of this system are lightweight billet aluminum single-adjustable shocks featuring a fully threaded body, enabling precise ride height tuning and weight-balance adjustments. The included 10-inch, 650 lb/in high-travel springs use a tapered flat large-diameter design with a smaller wire diameter and fewer coils than conventional springs of the same rate, reducing unsprung weight and improving suspension response. Each shock is 100% dyno tested and serialized at the factory and is serviceable and rebuildable through QA1 Authorized Service Centers.

Kit Contents:

• (2) QA1 GS507 Single-Adjustable Billet Aluminum Coilover Shocks
• (2) 10 in. 650 lb/in Tapered Flat Large-End High-Travel Springs
• All necessary mounting hardware

Key Features:

• Single-adjustable simultaneous compression and rebound damping control
• Fully threaded shock body for ride height and corner-weight adjustment
• Lightweight billet aluminum construction reduces unsprung mass
• High-travel spring design with tapered flat, large-diameter upper end
• Easy bolt-in installation using stock mounting locations
• 100% dyno tested and serialized — each unit individually verified
• Serviceable and rebuildable by QA1 Authorized Service Centers
• Made in the USA
• Sold as a pair

Suitable for a wide range of driving environments including drag racing, street performance, autocross, road racing, and street rod builds. QA1 backs this system with a one-year warranty against defects in materials and workmanship from the date of original purchase.