Metric Upper Control Arm Left 8-1/2in

The Metric Upper Control Arm Left 8-1/2in from ALLSTAR PERFORMANCE is an essential suspension component for high-performance street and race vehicles requiring metric fastener compatibility. This left-side control arm is engineered for builders and mechanics who demand precision handling and adjustability in front-end geometry, making it ideal for custom builds, restorations, and competitive motorsports applications. Whether you're tuning camber, caster, and toe-in angles or replacing worn OEM components, this control arm provides the foundation for responsive steering and consistent cornering performance.

Constructed with robust design principles, the metric upper control arm features an 8-1/2-inch length that maintains proper suspension geometry and ball joint angles for optimized tire contact patch. The metric threading throughout ensures compatibility with modern fastener standards while eliminating cross-threading risks common with mixed imperial/metric hardware. ALLSTAR PERFORMANCE's machining tolerances allow straightforward installation and adjustment, letting you dial in precise suspension geometry without binding or excessive play—critical for minimizing tire wear and maximizing grip during acceleration, braking, and cornering loads.

This left-side control arm benefits street rodders, drag racers, and road course competitors who prioritize suspension tuning and reliability. Installation pairs seamlessly with matching right-side arms, ball joints, and steering knuckles as part of a complete front-end rebuild or upgrade. Confirm spindle bore and ball joint diameter compatibility with your specific vehicle platform before ordering; proper alignment and torque specifications are essential for safety and performance. At 4.25 lbs, this component integrates efficiently into lightweight builds while maintaining the structural integrity demanded by high-speed and high-load driving.