9in Upper A-Arm Slotted O Degrees

The 9in Upper A-Arm Slotted O Degrees from HOWE represents precision suspension engineering designed for serious performance and competition applications. This upper control arm is engineered for builders and mechanics who demand adjustability and durability in high-performance street, drag, and circle-track builds. The slotted design at zero-degree geometry provides the foundation for fine-tuning suspension geometry—a critical requirement when optimizing ride height, camber, and caster angles for handling or launch characteristics.

HOWE's 9-inch upper A-arm features slotted ball joint mounting holes that allow lateral adjustment without requiring a complete rebuild, giving you the flexibility to dial in geometry on the dyno or at the track. The zero-degree offset geometry integrates seamlessly with OEM or fabricated chassis platforms where vertical pivot geometry is your priority. Built from high-strength steel tubing and precision-machined end forgings, this control arm withstands the lateral and longitudinal loads imposed during hard acceleration, braking, and cornering. Weighing just 4.8 lbs, the compact 9-inch design fits tight engine bays while maintaining the structural integrity demanded by forced-induction and naturally aspirated powerplants alike.

This upper control arm is ideal for independent front suspension (IFS) conversions, custom hot rods, and competition vehicles where geometry adjustability is non-negotiable. Mechanics and fabricators routinely specify HOWE components for bracket racing, street performance, and vintage restorations because the slotted design eliminates the need for multiple arm lengths during setup refinement. Installation requires proper suspension knowledge and alignment equipment to extract maximum benefit from the adjustable geometry. Pair this with a matching lower control arm and suspension geometry software to achieve your target camber, caster, and kingpin inclination for optimal tire wear and handling balance.