QA1 specializes in performance shocks, suspension components, carbon fiber driveshafts, rod ends, ball joints, and more for various automotive markets, including circle track racing, drag racing, street performance, and street rodding.
With over 83,000 square feet of manufacturing space in Lakeville, MN, QA1 offers an extensive line of American-made suspension and driveline products.
Founded in 1993 by Jim Jordan, QA1 introduced rod ends and spherical bearings specifically for the performance racing industry, quickly becoming the #1 name in rod ends, spherical bearings, custom linkages, and similar products for the motorsports industry.
Always on the cutting edge of technology, QA1 recently introduced in-house filament winding of carbon fiber and similar materials to create driveshafts and other products.
With a continued focus on adjusting and expanding its offering of American-made high-performance suspension components and carbon fiber driveshafts, QA1 has grown to be a household name in the performance aftermarket.
These QA1 GM Pro Coil Systems are a great option for fully adjustable ride height and valving control.
Choose a spring rate and adjustability that fits your driving style, adjust the valving to match, and you are on your way.
These shocks utilize a fully threaded body that allows you to adjust your ride height for the perfect stance and weight balance for superior handling.
Front Pro Coil double adjustable stock mount shock kit.
Compressed length of 9.63" and extended length of 14.5".
Includes 10" spring with a rating of 750 for use on 99-06 Silverados/Sierras.
