aFe Pro Series Rear Diff Cover Kit Black w/ Gear Oil 86-16 Ford F-250/F-350 V8 7.3L/6.0L/6.4L/6.7LaFe Powers new front end differential cover brings performance engineering to the protection of your trucks front end. This differential cover has a 3 1 2 quart lube capacity (factory cover holds 2 1 2 quarts) at the factory fluid level line, a magnetic drain plug and a magnetic fill plug to remove unwanted debris. Built in external fins transfer heat from the fluid to the outside air for maximum cooling. aFe has also designed a large oil level sight