QA1 GD401-11300B Front Pro Coil Double Adjustable Coilover Shock Kit GM 11in 300lb/in Spring

The QA1 GD401-11300B is a front Pro Coil double adjustable coilover shock kit designed as a bolt-in upgrade for GM applications. This kit delivers fully adjustable ride height and independent compression and rebound valving control, making it an excellent choice for street performance, autocross, road racing, drag racing, and street rod builds.

The lightweight billet aluminum shocks feature a fully threaded body, allowing precise ride height adjustment for the perfect stance or fine-tuned weight balance. Each shock is 100% dyno tested and serialized at the factory. The included spring measures 11 inches with a 300 lb/in rate and a tapered flat end configuration, ideal for front axle weights between 1,601–1,700 lbs. The compressed length is 10.13 inches and the extended length is 14 inches.

The Pro Coil high-travel springs are American-made and engineered specifically for this system, featuring fewer coils and a smaller wire diameter for increased suspension travel and reduced unsprung weight. This translates to faster shock response and optimized suspension performance across a wide range of driving conditions.

Key Features:

• Front Pro Coil double adjustable stock-mount coilover shock kit
• Independent compression and rebound adjustment (2-way)
• Lightweight billet aluminum shock bodies
• Fully threaded body for ride height adjustment
• 11-inch, 300 lb/in spring with tapered flat end
• Compressed length: 10.13 in | Extended length: 14 in
• 100% dyno tested and serialized
• Serviceable and rebuildable by QA1 Authorized Service Centers
• Made in the USA
• Sold as a pair

QA1 backs this kit with a limited warranty against defects in materials and workmanship. Suitable for drag racing, street performance, autocross, road racing, and street rod applications.