To reduce rotating weight, the super-lightweight diff outdrives are machined from HUDY Spring metal material allowing extra material become eliminated on the exterior an element of the outdrives, further reducing the extra weight without effecting durability. The inner area of the outdrives is likewise hand-ground for perfect fitment to the diff instance. Made for usage with 2.5mm pin. The more powerful diff outdrives are the result of a brand new hardening procedure that increases lifespan and dependability. Set of 2.