Ford Racing M-1225-B1 8.8" IRS Axle Bearing & Seal Kit for 2005-14 Ford Mustang

Vehicle Fitment

• 2005-2014 Ford Mustang GT (S197, 4.6L V8 / 5.0L V8, RWD)
• 2007-2014 Ford Mustang Shelby GT500 (S197, 5.4L V8 / 5.8L V8, RWD)

Fitment Notes

• Fits S197 Mustang with 8.8" Independent Rear Suspension (IRS) differential only
• Does not fit 1986-2004 Mustang with solid rear axle - see M-1225-B for that application
• Does not fit 2015+ Mustang Super 8.8" IRS - see M-4413-B for that application
• Position: Rear outer axle shaft (left and right)

Features

• OEM-quality roller bearings manufactured to strict dimensional tolerances
• Designed specifically for the Ford 8.8" IRS 10-bolt differential
• Includes matching seals to prevent axle fluid leaks at the outer shaft
• Direct-fit replacement - no modification required
• Ideal for axle rebuilds, bearing replacement, or performance upgrades
• Made in the USA; backed by Ford Performance warranty

Specifications

• Bearing Type: Roller Bearing
• Bearing O.D.: 2.5308-2.5315 inches
• Bearing I.D.: 1.6189-1.6194 inches
• Differential: Ford 8.8" IRS, 10-Bolt
• Position: Rear, Outer Axle Shaft (Left & Right)
• Axle Seals: Included
• Package Weight: 1.2 lbs
• Package Dimensions: 4" x 4" x 4"

Included Components

• 2x Outer Axle Shaft Roller Bearings
• 2x Outer Axle Shaft Seals

Product Description

The Ford Racing M-1225-B1 is a complete outer axle bearing and seal kit designed for 2005-2014 Mustang GT and Shelby GT500 models equipped with the 8.8" Independent Rear Suspension (IRS) differential. Whether you're rebuilding a worn axle, replacing a leaking seal, or refreshing the rear end during a performance build, this kit delivers OEM-level precision with the durability required for street and track use.

Each kit includes two outer axle shaft roller bearings and two matching seals - enough to service both sides of the rear axle in one job. The bearings are manufactured to tight tolerances for a proper press fit, reducing slop and ensuring long-term reliability. This is the correct kit for S197-generation Mustangs only; buyers with 1986-2004 or 2015+ applications should select the appropriate alternate part number.