Do I need a poly diff mount to go with poly SFBs?

[shiboujin]

I did. I don't remember the directions saying it needed it though.

[SimplyDope]

75d is perfect for a street car IMO if you're looking for a bit more feel over OEM. I don't find it harsh at all. Running poly everywhere in the m42, including motor mounts. Just wouldn't do the tranny though.

[Gerta]

Simply - really? Why no tranny mounts poly? I have a 318is / M42 motor and have poly subframe bushings, diff mount, and tranny mounts w/ TME's. Everything else is new OEM rubber. Doesn't seem to harsh at all.