The Ford Racing Cobra IRS axle girdle strengthens the 8.8-inch 10-bolt rear differential on 1999–2004 Cobra Mustangs. Constructed to reduce housing flex, it uses load bolts to support differential bearing caps, helping to prevent bearing wear and ring‑and‑pinion tooth damage under load. Built from lightweight 356-T6 aluminum, it’s specified for independent rear suspension carriers.
Ford Racing 1999-2004 Cobra IRS Axle Girdle Cover