2.5in C/O Kit QA1 7in

The ALLSTAR PERFORMANCE 2.5in C/O Kit QA1 7in Coil-Over Kit is a complete suspension upgrade designed for custom and race vehicles requiring adjustable ride height and damping control. This kit combines a 2.5-inch ID spring with a 2-inch smooth body shock absorber mounted in a 7-inch aluminum sleeve, delivering the adjustability and responsiveness needed for serious performance driving, autocross competition, or off-road terrain management.

The aluminum construction with black anodized finish provides corrosion resistance and extended service life in varied environments. QA1 aluminum shocks are engineered for quick response and consistent damping across a wide range of vehicle speeds and suspension travel. The 7-inch sleeve accommodates spring preload adjustment, allowing fine-tuning of ride height and spring rate characteristics—critical for optimizing handling balance and ground clearance. The 2-inch smooth bore design minimizes friction and enables precise shock response without the wear characteristics associated with chrome-plated shafts in demanding applications.

This coil-over kit is ideal for builders and tuners who prioritize adjustability over bolt-and-forget convenience. The modular design pairs well with custom control arms, brackets, and mounting solutions. Buyers should verify fitment compatibility with their specific vehicle platform, as coil-over kits require frame or suspension attachment points suited to the sleeve diameter and shock mounting geometry. Installation typically requires professional alignment after setup to ensure proper handling characteristics and tire wear patterns.

Coil-over suspension allows independent control of spring rate and damping—a significant advantage over OEM springs paired with fixed shocks. This kit's QA1 aluminum construction represents a proven platform in the performance vehicle market, where durability and consistent behavior under load are essential.