aFe Power's new rear 10.25 & 10.50-12 Bolt differential cover brings performance engineering to the protection of your F-250 / F-350 rear-end. This differential cover has a 5 quart lube capacity (factory cover holds 4 quarts) at the factory line , a magnetic drain plug, a magnetic tipped fill plug for maximum rear-end protection. Built-in internal and external fins transfer heat from the fluid to the outside air for maximum cooling. aFe has also designed a large oil level site glass with calibration plug set to the factory fluid level to eliminate overfilling. This differential cover is constructed out of durable die-cast A380-T6 aluminum with reinforced ribs and a wrinkle black powder coating with machined fins for maximum strength and styling. This cover uses an O-ring mounted in the machined channel for a leak-free seal.
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