Ford Racing (M-4033-KA) 8.8" Aluminum Axle Cover with Differential Cooler Ports Original equipment on 2013 Mustang Shelby GT500 with Track Pack option Fits any 8.8" Ford rear end except IRS models Recommended for road racing or extended high speed/high temperature applications to reduce gear oil break down, increase gear and bearing life Cooling fins help reduce gear oil temperature Cover machined for differential cooler pickup and return fittings