Steeda Ford Mustang Adjustable Upper Control Arm – Poly End

Steeda Mustang Adjustable Upper Control Arm – Poly End

Steeda’s adjustable rear upper link sets pinion angle and reduces axle wind-up under load. Its three-piece urethane package combines softer outer bushings with a hard centre for articulation and support. Steeda states quiet operation without added vibration.

Double adjustment works with the arm installed. It bolts into the original mount. Included stepped spacers fill the gap between the factory 14 mm bolt and 16 mm mounting hole to prevent clunking. these have been included in 555-4105 since February 2007.

Spherical-ended 555-4107 increases noise/vibration and is competition-only. Their new mounts do not require the stepped spacers.

Instructions and videos

• Instructions (PDF)
• Product video on YouTube

Related vehicles

• Mustang S197 2005–2010, part 555-4105 polyurethane version