QA1 GS507-11300C GM Pro-Coil Front Single-Adjustable Coilover Shock Kit 11" 300 lb/in

The QA1 GS507-11300C is a front Pro-Coil single-adjustable coilover shock kit designed for GM applications using a stock mount configuration. Built with a lightweight aluminum body, this kit delivers improved handling and ride quality over factory suspension components without requiring major modifications.

The single-adjustable shock absorber allows tuning of compression and rebound damping to suit your specific driving needs, whether for street performance or strip use. The kit includes an 11-inch spring rated at 300 lb/in with a tapered flat, large-diameter design for optimized spring seating and stability.

Key Features:

• Aluminum shock body for reduced unsprung weight
• Single-adjustable damping for on-the-fly tuning
• Compressed length: 9.63"
• Extended length: 14.5"
• Includes 11" coil spring rated at 300 lb/in
• Tapered flat, large-diameter spring configuration
• Stock mount fitment — no major fabrication required
• Pro-Coil series design for street/strip performance

QA1 is a trusted name in performance suspension, driveshafts, and chassis components. The GS507-11300C Pro-Coil kit is an ideal upgrade for enthusiasts looking to sharpen handling dynamics while retaining a street-friendly, bolt-in installation.