2001 330i BMW diameter question

online question:

This converter comes from a 2001 330i BMW. Does anyone know the diameter of the tower where the piston I.D. rides?

The diameter is the same as an SA-8, or 3.3335. If the unit needs to be opened, one member suggests to cut between the little hole and the inner edge, work your way out toward the three little holes, listen to the tone change, and a light tap will break it away, roughly .06-.08″ thick.

-Found in March 2011 Newsletter