Upgrade your 1978-88 GM G-body with Ridetech adjustable Coilovers. You'll get high performance handling, exceptional ride quality and the ability to adjust your car's ride height. HQ-Series coilovers feature 24-position rebound adjustment to help you fine tune the shocks to your driving preferences and vehicle demands. TQ “Track Quality” Series provides single rebound adjustment combined with dual stage – high speed and low speed – compression adjustment. High speed adjustment allows tuning for impact harshness and low speed adjustment allows tuning of cornering characteristics, perfect for use on the autocross, road course and drag strip. All are backed by Ridetech's exclusive 1,000,001 mile warranty. RideTech develops the 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.