Upgrade your 1979-2004 Mustang's rear suspension with QA1 Rear Trailing Arms. Made from 0.120 in. wall cold rolled steel or 1 1/4 in. diameter, 0.120 in. wall steel tubing, these arms provide maximum strength and flex elimination. The fluted, greasable polyurethane bushings offer superior performance, while the adjustable design allows for easy handling and traction adjustments.