Torsion Arm RR XP Black

The Torsion Arm RR XP Black is a precision-engineered rear passenger-side suspension component designed specifically for high-performance sprint cars and competition vehicles. Built by ALLSTAR PERFORMANCE, this torsion arm delivers the geometry and durability required in demanding racing environments where suspension tuning directly impacts lap times and handling consistency. Whether you're fine-tuning your sprint car's rear-end setup or replacing a worn component, this direct-fit torsion arm integrates seamlessly into existing rear suspension systems.

Machined from aluminum and finished in black anodizing, the Torsion Arm RR XP Black features a 1-inch spline interface and 5-inch offset configuration that maintains precise wheel alignment while supporting load transfer during cornering and acceleration. The 16-inch length and 1-inch spline geometry are critical tolerances that govern suspension travel and anti-roll characteristics; any deviation directly affects chassis balance. The included hardware ensures a complete installation without sourcing additional fasteners, and the aluminum construction keeps unsprung weight minimal—a priority in sprint car design where reducing rotational mass improves acceleration and brake response.

Sprint car racers and suspension-focused mechanics rely on this rear passenger-side torsion arm when rebuilding rear suspension geometry or upgrading to tighter tolerances. Its 5-inch offset and specific 16-inch length make it compatible with standard sprint car rear axle assemblies that use 1-inch spline torsion bar systems. Verify your vehicle's spline diameter, offset measurement, and overall arm length before ordering to ensure proper fitment; incorrect dimensions will compromise chassis geometry and handling predictability. At 2.88 lbs, this component contributes negligibly to total vehicle weight while delivering the precision control that competitive racers demand.