Yukon Gear & Axle YA FMUST-4-31 Axle Kit Fits 99-04 MustangAxle Kit Axle Kit; 8. 8 in. 10 Bolt; Rear; 31 Spline; SPECIFICATIONS: Position: Rear WARNING CA Proposition 65: Yes WARNING CA Proposition 65 Message: WARNING: This product can expose you to chemicals including arsenic; which is known to the State of California to cause cancer. For more information; go to www. P65Warnings. ca. gov. FEATURES: Fits Ford 8. 8 in. In 1999 2004 Mustang 5 Lug Includes Dura Grip Positraction; Carrier Bearings And Races;