This Currie® Extreme 60 housing for builders features the ductile iron center casting, 3.500" o.d. x .375" wall d.o.m. steel tubes and no inner C knuckes. This housing includes an AR400 steel bottom skid plate and all of the other standard Currie® Extreme 60 features such as fill plug, drain plug and ring gear load bolt. NOTE: Cover and yoke not included. Carriers must be turned down to 8.300" o.d.