Torsion Arm RR Billet HD Black

The ALLSTAR PERFORMANCE Torsion Arm RR Billet HD Black (ALL 55016) is a heavy-duty rear torsion arm engineered for sprint car suspension geometry and designed specifically for the right-hand (passenger) side. Constructed from billet aluminum and finished in black anodize, this component delivers the structural integrity and corrosion resistance required in competitive racing environments where suspension tuning and durability are non-negotiable.

The billet construction provides superior material density compared to forged or cast alternatives, resulting in tighter tolerances and consistent performance across thermal cycles. Black anodizing protects the aluminum substrate from oxidation and salt exposure, critical for vehicles operated at dirt tracks or in harsh environments. Weighing 3.05 lbs and dimensioned at 6 x 2 x 17.5 inches, the arm integrates seamlessly into sprint car rear-end assemblies where space constraints and unsprung weight matter. Hardware is included, eliminating the need for sourcing fasteners separately—a practical consideration for race shops managing multiple builds simultaneously.

This component is engineered for sprint car applications where the rear torsion arm controls lateral chassis movement and maintains suspension geometry under cornering loads. Teams selecting a torsion arm replacement evaluate material rigidity, finished surface durability, and fitment accuracy. ALLSTAR PERFORMANCE's billet approach ensures minimal deflection under high-G racing conditions and resistance to the corrosive environment of competition at oval tracks. The passenger-side designation allows builders to source the matching driver-side unit separately for complete rear-suspension geometry control.