The new matte black Rugged Ridge Boulder Aluminum Differential Covers are constructed from A356 - T6 cast aluminum for strong impact resistance and feature a precision machined sealing surface, allowing gaskets or RTV sealant to be used for a leak - free seal. Each cover is designed to help protect internal components from damage caused by contact with rocks and other terrain off - road as well as aid in dissipating heat from differentials. These covers also come complete with a magnetic drain plug for protection against costly damage from metal particles that can accumulate in gear oil and include a specially designed dipstick bolt to help Jeep owners avoid under or overfilling their differentials. Patent No. D798,906



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