BMR 78-87 GM G-Body Non-Adjustable Upper A-Arms Delrin 0.5in Tall Ball Joint - RedA arms are one of the most important, yet overlooked suspension components. They are the direct link between the front wheels and the chassis. Any deflection causes a change in alignment, which results in poor performance and driving feel. Fabricated from heavy duty 1. 25 inch, 0. 095 inch wall DOM tubing with laser cut, CNC formed plate steel braces for extra strength, deflection is eliminated with A arms from BMR's suspension. BMRs AAU462 Upper A