E9x, E8x Ford 8.8 IRS Differential Swap Kit Upgrade your BMW E9x or E8x chassis with our kit to swap in a 2007-2010 Ford Explorer IRS 8.8 rear differential. Known for its strength and availability, the Ford 8.8 is a major upgrade over the stock BMW unit. Key Features: Strong & Lightweight: Late-model Explorer aluminum housing with dual front mount ears and a rear cover with mounting bosses. Proven Performance: Lighter than the BMW iron diff and nearly indestructible—used in our car and customers that hit a sub-1.2-second 60-foot. Fastest E9x and e8x have proven this mount kit Kit Includes: OEM-Friendly: Uses OEM BMW front mounts and ties directly into the bottom of the rear subframe to reduce wheel hop. Flexible Fitment: Rear bracket works with early and late subframe hole patterns. Some minor drilling may be needed; M10 hardware included. Easy Install: Includes subframe inserts with captive nuts for added strength and a cleaner install. DIFFERENTIAL IS NOT INCLUDED What You'll Still Need: Axles: Available from Drive Shaft Shop or off-the-shelf from Seems Legit Garage. Driveshaft: Use a custom unit from a local shop or modify your stock one. Tips: Use stock or poly bushings in the subframe to allow for some flex. Avoid full solid mounts—the solid rear bracket doesn’t allow any torsional movement. Note: Not compatible with M3 models.
