QA1 GD401-10600B GM Double Adjustable Front Pro Coil System 10in 600lb/in Tapered Flat Spring

The QA1 GD401-10600B GM Pro Coil System is a complete front coilover kit engineered for enthusiasts who demand fully adjustable ride height and precise valving control. This double adjustable system features independent compression and rebound adjustment, giving you ultimate fine-tuning capability for anything from street cruising to competitive track use.

At the heart of this kit are lightweight billet aluminum double adjustable coilover shocks with a fully threaded body, allowing easy ride height adjustment for the perfect stance or precise weight balance tuning. Each shock is 100% dyno tested, serialized, and fully serviceable and rebuildable by QA1 Authorized Service Centers.

The kit includes 10-inch, 600 lb/in tapered flat-upper high-travel springs (part number 10HTSF600), specially designed for QA1 Pro Coil Systems. These American-made springs feature fewer coils and a smaller wire diameter, resulting in greater suspension travel and reduced unsprung weight for faster, more responsive handling.

Key Features:

• Double adjustable: independent compression and rebound control
• Lightweight billet aluminum coilover shock bodies
• 10-inch, 600 lb/in tapered flat-upper high-travel springs included
• Fully threaded body for ride height adjustment
• 100% dyno tested and serialized from the factory
• Serviceable and rebuildable by QA1 Authorized Service Centers
• Easy bolt-in installation with all mounting hardware included
• Made in the USA
• Sold as a pair

Suitable for drag racing, street performance, autocross, road racing, and street rod builds, the GD401-10600B delivers competition-level suspension performance with the flexibility to adapt to a wide range of driving conditions and setups.