the revo 3.3 doesnt come with center diff or rear brake. the only differece between the revo 2.5 and 3.3 is the 3.3 has the 3.3 motor and an extended chassis....it has p2's with it also. the center diff and rear brake setup is an optional setup.
duh i kno this [:@] noob (J/K!!!)
Traxxas doesn't.... they're all RTR's.
your right traxxas doesnt but there are kits out there.
the revo comes in rtr and kit version but its only the 2.5 as of now
