QA1 7Q63 7Q Series Small Body Shock Twin Tube 6in. Stroke 3C/3RQA1 7Q63 7Q Series Small Body Shock Twin Tube 6in. Stroke 3C 3R QA1s rebuildable twin tube shocks offer the performance, consistency and tunability racers demand. Formerly known as 70 series shocks, the 7Q series is a small body bearing mount shock. Racers can choose from 6 and 7 bodies depending on rules and applications. The twin tube design gives you a great feel for the track surface, making them a good fit for asphalt and dry slick dirt tracks.