QA1 GS507-10350C GM Pro-Coil Front Coilover System Single Adjustable Aluminum Shock Kit 350 lb/in

The QA1 GS507-10350C is a front Pro-Coil single adjustable coilover shock kit engineered for GM stock-mount applications. Featuring lightweight billet aluminum twin-tube shocks, this kit converts your factory front suspension to a fully adjustable coilover setup while retaining stock configuration control arms for a straightforward bolt-in installation.

The GS507-series shocks deliver 18 valving positions of simultaneous compression and rebound adjustment, allowing you to dial in a comfortable cruising ride or firm up handling for spirited driving. The fully threaded shock body provides ride height adjustment, letting you fine-tune your stance or precisely balance corner weights for improved handling dynamics.

Included springs are 10-inch tapered flat large-diameter high-travel units rated at 350 lb/in. These American-made springs feature fewer coils and a smaller wire diameter compared to conventional designs, which increases travel distance between coils, reduces unsprung weight, and improves suspension response. The shock has a compressed length of 9.63 inches and an extended length of 14.5 inches.

Kit Includes:

• 2 x QA1 GS507 Single Adjustable Billet Aluminum Coilover Shocks
• 2 x 10-inch 350 lb/in Tapered Flat Large-Diameter High-Travel Springs
• All necessary mounting hardware

Key Features:

• Single adjustable — simultaneous compression and rebound control with 18 valving positions
• Lightweight billet aluminum shock body construction
• Fully threaded body for ride height adjustment
• Compressed length: 9.63 in. | Extended length: 14.5 in.
• 10 in. tapered flat large-diameter 350 lb/in high-travel springs
• 100% dyno tested and serialized
• Serviceable and rebuildable by QA1 Authorized Service Centers
• Made in the USA
• Suitable for street performance, autocross, road racing, and street rod applications

The QA1 Pro-Coil GS507-10350C is an excellent suspension upgrade for anyone seeking adjustable ride height and valving control while maintaining a stock-mount configuration on GM full-size and muscle car platforms.