Mag-Hytec Differentrial Cover Dana 70 Call for fitment Dana#70 MAG-HYTECS heavy duty differential covers provide increased lubricant and cooling capacity for hard working recreational and service vehicles. MAG-HYTEC covers set your vehicle apart in both aesthetics and function - cast in A356-T6 aluminum and texture powder coated black with machined cooling fins. Magnetic drain plugs trap worn gear material promoting fluid integrity. Each unit is fitted with ARP 568 O-rings for superior sealing. All hardware is 303 stainless steel, in most applications no gasket or sealant is required, and all MAG-HYTEC parts are covered by a lifetime limited warranty.