57t metal / Aluminum center diff 

And Aluminum Center Gearbox motor mount 

All the same part number for spur and center diff case and mount for all :

outcast, mojave, and kraton 4s v2.5 lineup, and all new 3s 223s lineup senton vorteks granite typhon etc.

also retrofits to older chassis style with slipper setup, this will replace that entire unit and motor bolts right up.