QA1 GD401-10650B GM Pro-Coil Double Adjustable Front Coilover System 650 lb/in

The QA1 GD401-10650B GM Pro-Coil System is a complete front double-adjustable coilover kit designed to replace factory suspension with a fully tunable, performance-grade setup. Featuring lightweight billet aluminum shocks and purpose-built high-travel springs, this system delivers precise ride height control and independent dampening adjustment for street performance, drag racing, autocross, road racing, and street rod builds.

Double Adjustable Shock Features:

• Independent compression and rebound adjustment — 18 positions of rebound and 18 positions of compression provide 324 unique valving combinations
• Lightweight billet aluminum construction for reduced unsprung weight
• Fully threaded shock body for ride height adjustment and precise weight distribution tuning
• 100% dyno tested and serialized at the factory
• Serviceable and rebuildable by QA1 Authorized Service Centers
• Made in the USA

High-Travel Spring Specs:

• 650 lb/in spring rate — suited for front end weights of approximately 2,201–2,300 lbs
• 10-inch tapered flat spring (tapered body, flat upper end style)
• Chrome-plated, specially designed high-travel springs with fewer coils and smaller wire diameter for increased suspension travel and reduced unsprung mass

Kit Includes:

• (2) Double adjustable billet aluminum coilover shocks
• (2) 10-inch 650 lb/in chrome-plated tapered flat springs
• All necessary mounting hardware

QA1's Pro-Coil Systems are engineered from the ground up to outperform stock suspension in every measurable way. The high-travel spring design optimizes shock stroke and allows for greater usable ride height range, making this kit equally at home on the street or the track. Sold as a pair.