NO internally it is the EXACT SAME SIZE AS T34, and uses a trim wheel from a T34.
If you look at a escy T34 it reduces in size at the entry to the same size, ie entrance to trim wheel is TAPERED.
The reason I did it this way was to save having to pfaff around with diffrerent pipes, plus my other two secret mods!!
Bearing housing is the same across T3/34/4 as well.
tabetha