aFe Power 46-70150 Ford F-150 Rear Differential Cover (Raw; Street Series) Constructed out of durable, die-cast A380 aluminum with reinforced ribs Built-in external fins, magnetic drain plug and 1/8" NPT calibration plug set to the factory fluid level Fits 97-15 Ford Trucks with the 12 bolt-9.75" axles; modifications may be required on 2010 and earlier vehicles Includes a fully machined groove to accept supplied O-ring Works great with oil level sight glass (Part Number: 46-00001) or deep reach magnetic fill plug (Part Number: 46-00002)