The Proform/Specialty Auto Parts' Perfect Launch differential cover is made of reinforced lightweight aluminum and designed to strengthen the rear housing case in heavy torque situations. This product is currently available for GM 10-bolt, GM 12-bolt, and Ford 8.8-inch applications. All covers have a black-painted finish with milled logo. Each cover includes two bolts to stabilize bearing main caps, two magnetic drain plugs, and cover-mounting bolts. $142.