Upgrade your 1979-1989 Mustang with HQ Series adjustable CoilOver Struts. You'll get high performance handling, exceptional ride quality and the ability to adjust your car's ride height. Our CoilOver Struts feature 24-position rebound adjustment to help you fine tune the shocks to your driving preferences and vehicle demands. With large 1.834" pistons, heavy duty 5/8" shafts, and impact forged bodies, HQ Series CoilOver Struts are built to perform and made to last. They're backed by our exclusive 1,000,001 mile warranty. RideTech develops our shock calibrations and spring rates through thousands of cross-country test miles, on our exclusive test track and at competition events from coast to coast. We understand the suspension needs of your F-body better than any other company. This system includes two front Q Series CoilOver Struts and two Hyperco coil springs with proper spring rate.