Shock Steel Twin Tube 9in Comp 3 Reb 5

The Shock Steel Twin Tube 9in Comp 3 Reb 5 by QA1 is a purpose-built shock absorber engineered for circle track racing applications where precision suspension tuning directly impacts lap times and handling consistency. Twin-tube design isolates compression and rebound circuits, allowing drivers and teams to dial in independent velocity-sensitive damping characteristics without compromise. This shock excels in environments demanding predictable, repeatable performance across varying track conditions and vehicle loads.

Built from steel construction with black zinc plating, the Shock Steel Twin Tube features a 9-inch stroke length and C3-R5 valve configuration—denoting 3-stage compression and 5-stage rebound valving. This multi-stage architecture enables fine control over suspension response across the full range of motion, preventing harshness while maintaining supportive damping when needed most. The twin-tube geometry separates the main piston chamber from a secondary compensator circuit, reducing aeration and maintaining consistent damping force even under sustained high-load cornering or repeated brake/acceleration cycles common in circle track racing.

Circle track racers—including short-track stock car, dirt modified, and asphalt oval competitors—rely on QA1 shocks to achieve balanced platform heights and load transfer control essential for competitive setup windows. The 5.83 lb unit is sized for mid-sized vehicles and is sold individually; teams typically purchase multiple units to build a complete four-corner suspension package. Installation on compatible circle track chassis requires correct ride height tuning and damping adjustment to match specific track surface, car weight distribution, and driving style for optimal results.