QA1 79-04 Ford Mustang/79-86 Mercury Capri Lower Boxed Trailing Arms

Starting with 0.120'' wall cold rolled steel tubing, these boxed trailing arms are built for serious strength and to eliminate flex in your 1979-2004 Ford Mustang or 1979-1986 Mercury Capri's rear suspension. The stock rubber bushings can bind up, especially under load, which hurts traction and makes the car's handling less predictable. These QA1 arms swap those out for fluted, greasable polyurethane bushings that let the suspension move more freely.

The boxed design itself is a big step up from stock, providing a solid foundation that won't twist or flex. This means your tires stay planted more consistently, giving you better grip off the line and through corners. Because they're designed as a direct replacement, installation is straightforward, usually just a bolt-in job. The gloss black powder-coat finish not only looks sharp but also helps protect the steel from corrosion for a long-lasting upgrade.