The Mag-Hytec Dana 70 rear differential cover is cast in A356-T6 aluminum and texture powder coated black with contrasting machined cooling fins, the Mag-Hytec differential cover boasts increased fluid and cooling capacity, a magnetic dipstick for checking fluid level and checking metal particulate, a magnetic drain plug, a fluid level reference plug, as well as a temperature sender port in 1/8"NPT. All Dipstick, drain plugs and reference plugs are MS 33649 and fitted with ARP 568 O-rings for superior sealing. All fasteners are T-303 stainless steel. The cover seal is a dovetail groove mounted ARP 568 O-ring that requires no sealant or gasket. It can be removed and reinstalled several times without replacement.