Fits all 8.8" axles 1986-2014 including IRS except 2013 Boss and 2013-2014 GT500 Fits all 8.8" axles 1986-2014 including IRS except 2013 Boss and 2013-2014 GT500 Excellent upgrade for all 8.8" rear ends. High-torque bearing adds durability for modified vehicles Contains all components from M-4210-A plus all differential bearings Note: does not fit 2013 Boss or 2013-2014 GT500 with axle codes S-215-D and S-219-D Kit includes: 2012 Shelby GT500 high-torque rear pinion bearings Pinion and carrier shims Crush sleeve Pinion nut Pinion seal Ring gear bolts Heavy duty carrier bearings Gear-marking compound Cover gasket