A-Arm 8in Screw In B/J Slotted Bearing

The A-Arm 8in Screw In B/J Slotted Bearing from JOES RACING PRODUCTS is a precision-engineered upper control arm designed for serious suspension tuning in road racing, autocross, and circle track competition. This tubular aluminum and steel assembly replaces factory control arms with a purpose-built component that gives drivers adjustability where it matters most. Whether you're dialing in camber curves or fine-tuning steering geometry on a dedicated race car, this slotted bearing-style arm delivers the repeatability and adjustability that separates competitive builds from street machines.

At 8 inches in length with a 10-degree geometry correction and a screw-in ball joint design, this control arm integrates seamlessly into modified suspension systems where camber and caster curves require real-time adjustment. The slotted bearing configuration allows arc-length changes without ball joint replacement, meaning you can make multiple geometry setups on a single arm—critical during driver changes or track conditions that demand instant adjustment. Black powder coating protects against moisture and corrosion while maintaining the lightweight characteristics essential for competition vehicles. The aluminum and steel construction balances rigidity with weight savings, and at 3.49 pounds, it keeps unsprung mass minimal where it impacts handling response and tire loading.

This arm excels on dedicated race platforms where suspension geometry matters as much as horsepower. Mechanics building circle track packages, road racing setups, or serious autocross competitors will appreciate the screw-in ball joint interface, which allows quick component swaps without pressing operations. Installation pairs best with modern suspension arms, bump steer boxes, and adjustable tie-rod systems on vehicles engineered for independent front suspension. Verify your vehicle's mounting points and ball joint bore before purchase to ensure proper fitment with your specific frame and spindle combination.