SKU: HOW2215115
MPN: 2215115
The 12-3/4in Upper A-Arm Slotted 15 Degrees is a precision suspension component engineered for vehicles requiring advanced geometry tuning and adjustable alignment capabilities. This upper control arm is designed for enthusiasts and professional builders seeking to dial in camber curves, optimize suspension geometry, or accommodate lowered setups where stock control arms no longer provide adequate clearance or adjustment range. Whether you're building a competition suspension system, restoring a classic with modern handling characteristics, or fine-tuning a street performance platform, this slotted upper A-arm delivers the geometry flexibility critical modern suspension work demands.
The slotted design allows incremental camber adjustment by repositioning the ball joint mounting holes, enabling you to compensate for ride height changes, correct tire wear patterns, or match a specific suspension geometry curve without requiring multiple A-arm purchases. The 15-degree manufacturing angle is factory-set for specific applications where this geometry angle integrates with spindle geometry and suspension kinematics to produce predictable handling behavior and tire contact characteristics. At 5.36 lbs and measuring 16.3 x 3 x 17.1 inches, this component is sized for mid-size platforms and incorporates robust forging or casting construction to handle repeated adjustment cycles and the lateral loads imposed during cornering and braking events.
This control arm benefits fabricators, race mechanics, and powersports enthusiasts who need to match suspension geometry to lowering springs, coilovers, or adjustable-height setups. Installation requires removal of the original upper A-arm and ball joint, then bolting the slotted unit in place using existing steering knuckle and frame mounting points—making it a direct bolt-on for compatible platforms. Proper alignment and geometry verification using a suspension alignment rack is essential after installation to ensure camber settings, caster curves, and suspension travel remain within design parameters and deliver responsive, predictable handling characteristics.
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