aFe Power's new differential covers bring performance engineering to the protection of your axle's differential. These differential covers are constructed out of durable cast aluminum with reinforced ribs and machined fins for maximum strength and styling. The covers come with all necessary hardware for easy installation. The covers fit 97-18 Jeep Wranglers with Dana 30 front axles and Dana 44 rear axles. Built-in internal and external fins transfer heat from the fluid to the outside air for maximum cooling. This system incorporates a magnetic drain plug to capture loose particles for maximum protection. Also included is a 1/8 in. NPT calibration plug that is set to the factory fluid level which eliminates accidental overfilling.