COIL OVER KIT 2.5IN ID 6Q SERIES THREADED BODY

The QA1 Coil Over Kit 2.5IN ID 6Q Series Threaded Body is a complete suspension upgrade designed for performance-minded builders and enthusiasts who demand precise ride height adjustment, superior damping control, and repeatable handling characteristics. Built on QA1's proven 6Q Series shock platform, this threaded-body coil-over assembly replaces factory suspension geometry with a tunable, track-ready system that supports both street and competition applications. Whether you're lowering a street car for aesthetics and improved weight transfer, or setting up a road course competitor for maximum tire contact patch, this kit delivers the adjustability and durability that separates intentional engineering from bolt-and-forget modifications.

At the heart of this system is a 2.5-inch inside diameter spring pairing matched to a 2-inch bore shock body, engineered to balance progressive spring rates with controlled damping through the full suspension stroke. The threaded shock body allows infinite ride height tuning—turn the collar up to raise, down to lower—without swapping springs or sacrificing damping performance. QA1's aluminum construction with black anodized finish resists corrosion while maintaining a clean appearance that complements modern vehicle aesthetics. The compact package (4.3 x 2.5 x 8.4 inches) and lightweight 0.74 lbs per unit make installation straightforward on most chassis configurations, while the precision-threaded design ensures adjustment stays locked under road loads and repeated compression cycles.

Mechanics and builders favor the QA1 6Q Series for independent front suspension, solid-axle rear setups, and custom chassis where OEM suspension geometry no longer applies. The kit's modular design integrates with existing mounting points across a wide range of makes and models—confirmation of bolt-pattern and mounting interface specifications with your specific vehicle platform is essential before purchase. Real-world applications range from classic car restorations seeking modern ride quality to purpose-built race cars where suspension compliance and adjustability directly impact lap times and driver feedback.