Control Arm Shim 1.00in Dual Mount

The Control Arm Shim 1.00in Dual Mount from ALLSTAR PERFORMANCE is a precision alignment component designed for suspension geometry correction on vehicles requiring upper control arm adjustment. As a mechanic working on street cars, race builds, and chassis modifications, you'll recognize this shim as essential when fine-tuning camber, caster, or ride height without replacing entire control arm assemblies. The 1-inch thickness specification allows meaningful geometry correction while maintaining structural integrity and proper ball joint engagement. Whether you're setting up a dedicated track car or correcting factory alignment tolerances on a modified street vehicle, this aluminum shim delivers the adjustability serious suspension work demands.

Constructed from aluminum and finished in natural mill state, the Control Arm Shim 1.00in Dual Mount features a dual-mount design with 6-inch center spacing, allowing installation between the upper control arm and frame or spindle mounting points. This configuration distributes load evenly across both fastening locations, minimizing stress concentration and preventing premature wear or deflection under aggressive cornering or impact loads. The aluminum construction keeps unsprung weight to a minimum—at 0.61 lbs, this shim won't noticeably affect brake balance or suspension response. The machined surfaces ensure consistent thickness across the full 4.05 x 1.2-inch footprint, which is critical for maintaining parallel mounting surfaces and preventing binding in the control arm pivot zone.

Technicians and enthusiasts building independent-front-suspension vehicles, A-arm equipped race cars, or performing suspension geometry correction on classics will benefit from stocking multiple shims in graduated thicknesses. Installation involves removing the upper control arm fasteners, inserting the shim, and re-torquing to factory specification—a straightforward procedure that typically requires no special tools. This shim works alongside wheel alignment equipment to achieve target camber angles, and it's particularly valuable when combined with adjustable control arms or when frame-mounted attachment points have tolerance stack-up issues. Always verify mounting surface cleanliness and fastener preload after installation to ensure shim stability.