QA1 GM Pro Front Coil-Over System - Single Adjustable - 10in 550lbs/in - Select GM/Ford/Mercury 1958-1996

Fits select 1958-1996 Chevrolet, Ford, Mercury, and Edsel full-size models (see fitment table for specific submodel and chassis applications).

The QA1 GM Pro Coil-Over System provides a direct-fit solution for drivers seeking simultaneous control over compression and rebound valving. This single-adjustable system features lightweight billet aluminum shocks and high-travel springs, allowing you to fine-tune your vehicle's stance and handling characteristics for street performance, drag racing, or autocross. The fully threaded shock bodies offer up to 2 inches of ride height adjustment to achieve the perfect center of gravity and weight balance.

• Adjustable Valving: Single-knob simultaneous adjustment of compression and rebound for simplified tuning.
• Billet Aluminum Shocks: Lightweight, durable construction, 100% dyno tested and serialized.
• High-Travel Springs: American-made springs with fewer coils and smaller wire diameters for increased travel and reduced unsprung weight.
• Spring Specifications: 10-inch length with a 550 lbs/in rate, ideal for front-heavy full-size applications.
• Serviceable Design: Shocks are fully rebuildable and serviceable by QA1 authorized centers.
• Easy Installation: Direct bolt-in design compatible with factory or QA1 tubular control arms.
• Part Number: GS507-10550C
• Origin: Proudly made in the USA.