This cover has an increased oil capacity over stock for better performance over a longer duration. Built-in internal and external fins transfer heat from the oil to the outside air for maximum cooling. This cover incorporates a magnetic drain and deep reach fill plug to capture loose particles for maximum protection. A calibration plug is set to the factory oil level to prevent overfilling. A pre-installed oil level sight glass allows quick and easy oil inspection.. Pro Series Differential Cover Black w/ Machined Fins Ford F-250/F-350/Excursion 86-25 V8 (td) (10.25/10.50-12). Large Oil Level Sight Glass and Calibration Plug Set to the Factory Oil Level Prevents Overfilling. aFe Power Cover Diff Rear Machined COV Diff R Ford Diesel Trucks 86-11 V8-6.4/6.7L (td) Machined. Dual Neodymium Magnetic Plugs are Used for Maximum Gear Protection. Pro Series Differential Cover Black w/ Machined Fins. Constructed out of Durable Cast Aluminum. Black Powder Coat with Machined Fins. Pro Series Differential Cover. Rear Differential Cover. Differential Cover. DiffrlCover

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