QA1 GD507-10400C GM Pro-Coil Double Adjustable Aluminum Coilover Shock Kit 10in 400lb/in

The QA1 GD507-10400C is a front Pro-Coil double adjustable coilover shock kit built on QA1's lightweight billet aluminum GD507 shock body. Designed for GM full-size vehicles, this bolt-in kit delivers fully independent compression and rebound valving control paired with ride height adjustability, making it equally capable on the street, autocross course, or drag strip.

The double adjustable design provides truly independent compression and rebound tuning, giving you precise control over how your suspension reacts in any driving condition. The fully threaded shock body allows you to dial in ride height for the perfect stance or to fine-tune corner weight balance for superior handling.

Included American-made high-travel springs feature fewer coils and a reduced wire diameter, resulting in greater suspension travel and reduced unsprung weight for faster, more responsive handling. Every shock is 100% dyno tested and serialized at QA1's facility in Lakeville, Minnesota, and is rebuildable by any QA1 Authorized Service Center.

Key Features:

• Double adjustable lightweight billet aluminum coilover shock (GD507 Pro Series)
• Independent compression and rebound adjustment
• Fully threaded body for ride height adjustment
• Compressed length: 9.63" | Extended length: 14.50"
• Includes 10" high-travel spring rated at 400 lb/in with large tapered flat end
• Stock upper mount location — bolt-in installation
• 100% dyno tested and serialized
• Serviceable and rebuildable by QA1 Authorized Service Centers
• Made in the USA
• Sold as a pair

Suitable for drag racing, street performance, autocross, road racing, and street rod builds. Kit includes shocks and springs.