What is the best exhaust for a Testarossa?

He needs your car to build, so you'd have to be in the US to buy his exhaust :/

 

Does anybody know what makes the mufflers of the late Testarossa, 512TR and 512M connection wise different?

i recently wanted to install a Tubi (which is obviously declared by all direct dealer websites like Vivid etc fitting for all late Testarossa, 512 TR and M) and it didn’t seem to fit. Need to get pictures to show the issue.

Also have an Unused Fuchs that we wanted to try for long which states 512TR embossed on one fixing handle. Wondering whether this will also create issues...

In Germany probably non of the previously mentioned systems like Kreissieg etc would last long on the road although they do sound awesome i admit...