Aluminum Case
Moser aluminum cases are made of 356-T6 aluminum with 7075-T6 aluminum caps and billet steel adjusters, and they feature super strong through-bolt design to give the case increased strength and decreased ring gear deflection.Nodular Case
Moser Nodular Iron cases are the toughest on the planet. All Moser cases are heat treated and stress relieved before CNC machining is completed. In addition, Moser cases have forged steel caps with 5/8'' bolts, machined adjusters, and are tapped for an oil filler plug.