Shock Steel Twin Tube 7in Comp 4 Reb 10

The QA1 Shock Steel Twin Tube 7-inch Compensator 4 Rebound 10 (model 5Q74-10) is a purpose-built coil-over shock assembly engineered for circle track racing. This twin-tube design delivers the precision damping and consistency required for competitive oval track performance, where suspension tuning directly impacts lap times and vehicle handling under sustained lateral g-forces.

The 7-inch working length positions this shock for vehicles where wheel travel and ride height must be optimized within tight packaging constraints. The C4-R10 valve configuration specifies four compression settings and ten rebound settings, allowing tuners to dial in front or rear end response independently across a wide range of track conditions. Black zinc coating provides corrosion resistance during storage and transport, essential for equipment exposed to seasonal weather and variable humidity. Weighing 5.15 lbs, the compact 3.9 x 3.7 x 19.1-inch dimensions ensure fitment in space-limited suspension geometries common to purpose-built race vehicles.

This shock assembly addresses the needs of circle track racers—sprint car, modified, or short-track competitors—who require repeatable, tunable suspension performance without the complexity of triple-adjustable designs. QA1's focus on single-purpose racing applications means every specification is validated on the track rather than adapted from street or multipurpose platforms. Each unit ships individually, allowing racers to build matched pairs or sets with consistent valve curves.

Circle track racing demands shocks that respond instantly to load transfer and maintain consistent damping across hundreds of miles of racing. The twin-tube design dissipates heat effectively during continuous high-speed cycling, a critical factor when shock temperature directly correlates to performance drift. QA1's reputation in short-track OEM and aftermarket circles reflects decades of engineering focused exclusively on competitive racing, not general-purpose suspension work.