QA1 GM Pro Front Coil-Over System - Double Adjustable - 10in x 450lbs/in - Pigtail - Aluminum - Select 1955-1967 GM

Fits select 1955-1967 Buick, Chevrolet, Oldsmobile, and Pontiac vehicles, including Chevelle, GTO, Skylark, and 3100-3800 series trucks.

Achieve professional-grade suspension tuning with the QA1 GM Pro Coil System. This double-adjustable front coil-over kit provides independent control over both compression and rebound valving, allowing you to dial in precise handling characteristics for street performance, drag racing, or autocross. The lightweight billet aluminum shock bodies feature a fully threaded exterior for up to 2 inches of ride height adjustment, enabling the perfect stance while maintaining optimal suspension geometry.

This system includes QA1 high-travel springs, manufactured in the USA from lightweight wire with fewer coils than standard springs. This design reduces unsprung weight and prevents coil bind by providing a larger distance between coils, resulting in faster suspension reaction times. These units are 100% dyno-tested and serialized, ensuring consistent performance out of the box. Designed for an easy bolt-in installation, they compatible with factory control arms or upgraded QA1 tubular units.

• Manufacturer Part Number: GD501-10450A
• Adjustment Type: Double Adjustable (Independent Compression & Rebound)
• Spring Rate: 450 lbs/in
• Spring Length: 10 inches
• Shock Material: Lightweight Billet Aluminum
• Mounting: Pigtail style lower mount
• Height Adjustment: Up to 2 inches
• Serviceability: Fully rebuildable and serviceable
• Origin: Made in the USA
• Warranty: Limited Lifetime Warranty