A-Arm 8.75in Screw In B/J Slotted Bearing

The JOES Racing Products A-Arm 8.75in Screw In B/J Slotted Bearing is a precision tubular control arm engineered for dedicated road racers and high-performance enthusiasts who demand adjustability and durability in their suspension geometry. This upper A-arm is designed to replace OEM units in vehicles requiring fine-tuned suspension setup, offering the slotted bearing configuration that permits micro-adjustments to camber and caster without the need for costly machine work. Whether you're competing in club-level road racing or dialing in a dedicated track car, this component addresses the real-world requirement for tool-free geometry refinement between sessions.

Constructed from aluminum and steel with a durable black powder coat finish, the A-Arm features a screw-in ball joint design that simplifies replacement and maintenance without requiring press tools or specialized suspension equipment. The 8.75-inch length and 10-degree geometry angle are factory-specified for particular chassis applications, ensuring proper roll center and anti-geometry characteristics. The slotted bearing design permits adjustment of the ball joint position within a defined range, allowing suspension tuners to modify camber curves and handling balance on the fly—a critical advantage when testing setups across varying track conditions or tire compounds. The tubular construction balances strength with minimal weight, reducing unsprung mass while maintaining the rigidity necessary for aggressive cornering and load cycling.

This control arm is ideal for builders of purpose-built race cars, club racers upgrading aging suspension systems, and mechanics restoring high-performance vehicles where OEM geometry limitations hinder performance optimization. Installation requires removal of the existing upper A-arm and torquing of the screw-in ball joint to manufacturer specifications; compatibility depends on your vehicle's suspension design and mounting points. Verify fitment with your chassis manual or suspension supplier before purchase, as the 10-degree geometry and 8.75-inch dimension are application-specific. Pair this arm with matching lower control arms, quality suspension bushings, and a professional alignment to unlock the full benefit of adjustable suspension geometry.