Shock Alum Twin Tube 5in Comp 5 Reb 5

The QA1 Shock Alum Twin Tube 5-inch Compensator 5 Rebound shock absorber (model 6Q55) is a purpose-built suspension component for circle track racing and high-performance motorsports applications. This aluminum twin-tube design delivers precise damping control with a 5-inch compression and 5-inch rebound valve setup, enabling drivers to fine-tune suspension response across varying track conditions and load scenarios.

Twin-tube construction separates the main piston chamber from the low-pressure reserve tube, improving heat dissipation and maintaining consistent damping force during sustained use. The aluminum body reduces unsprung weight compared to steel alternatives, a critical factor in circle track racing where lighter suspension components improve handling response and tire contact consistency. The C5-R5 valve configuration—with equal five-position compression and rebound settings—allows competitors to dial in balanced force curves for both bump compliance and rebound control. Black anodized finish provides corrosion resistance and durability under race-day conditions.

This shock is engineered for dirt oval, asphalt short-track, and circle track vehicles where adjustable suspension geometry is essential to competitive performance. The 5-inch overall length fits most stock and modified suspension frames used in street stock, late model, and modified classes. QA1 shocks are recognized in circle track competition for their repeatability and tuning range, allowing drivers to adapt setup between races without component replacement. Each unit ships individually, making it suitable for single-shock replacement or as part of a complete suspension rebuild.