Dana 30 Differential Cover. CNC Laser cut and CNC Press formed 8 times from one piece,  makes the easiest  and strongest weld together diff cover on the market. The ultra thick 3/8" flange resists pulling off of the sealing surface while dragging the differential, while the 1/4" body resists denting even during the most abusive circumstances. Includes weld on skull logo, welded fill plug and 3/8" Grade 8 hardware. Welded and Machined flat.