QA1 GS501-11300C GM Pro Coil Single Adjustable Front Coilover Shock Kit 11in. Spring 300 lb/in

The QA1 GS501-11300C is a front Pro Coil single adjustable coilover shock kit engineered for GM applications. Featuring a lightweight billet aluminum shock body with a fully threaded design, this kit allows precise ride height adjustment and simultaneous rebound/compression damping tuning to match your driving style — whether that's daily street driving or aggressive track use.

The kit includes an 11-inch, 300 lb/in. rate coil spring with a large tapered flat end. The shock has a compressed length of 10.13 inches and an extended length of 17 inches. QA1's high-travel springs are purpose-built with a smaller wire diameter and fewer coils than conventional springs of the same rate, delivering more usable suspension travel and reduced unsprung weight for improved response and handling balance.

Key Features:

• Single adjustable: 1-way simultaneous rebound and compression adjustment
• Lightweight billet aluminum coilover shock body
• Fully threaded body for ride height adjustment
• 11-inch spring, 300 lb/in. spring rate, large tapered flat end
• Compressed length: 10.13 in. | Extended length: 17 in.
• Stock mount (OEM-compatible) installation
• High-travel, American-made coil spring with reduced unsprung mass
• 100% dyno tested and serialized
• Serviceable and rebuildable by QA1 Authorized Service Centers
• All necessary mounting hardware included
• QA1 Limited Lifetime Warranty (registration required at QA1.net/Warranty)

Compatible with factory OEM stamped steel control arms as well as QA1 tubular control arms, the GS501-11300C offers a true bolt-in upgrade. Required spanner wrench: P/N T114W or T115W (sold separately). Optional thrust bearing kit: P/N 7888-109.