aFe POWER differential cover brings performance engineering to the protection of your axles differential. This differential cover is constructed out of durable die cast A380 aluminum with reinforced ribs and a raw finish with machined accents for maximum strength and styling. This cover comes with all necessary hardware and includes an o-ring for a leak free seal. This cover has about a 5 quart lube capacity at the factory line; factory cover holds about 4 quarts. Built-in internal and external fins transfer heat from the fluid to the outside air for maximum cooling. This system incorporates a large magnetic drain and fill plug that captures loose particles for maximum rear-end protection. Pre-installed large oil level sight glass with calibration plug set to the factory fluid level to eliminate overfilling.