[BimmerBum]

I think some of the confusion here is coming from the fact that the sub frame and the trailing arms are different parts. At some points on this thread the sub frame is discussed as the trailing arms are part of it. They are not.

If you want to run a MZ3 spec rear end on your ti you just need the MZ3 trailing arms. Your ti sub frame works fine.

The M trailing arms are heavier. I do not believe there is any difference in the sub frame between the ti and the MZ3 other than the exhaust hangars.

Any bushings that will fit the MZ3 rear sub frame, trailing arms, or differential will also fit the ti.