Im looking for aftermarket exhaust to my 512TR Is there differences between Testarossa and 512TR exhaust system ?
Buy it from Mike, the vendor on the Testarossa board. I did and it is outstanding! Capristo. He will also be able to answer your questions about fit.
I sent email to him two times, he never answered, but I think he lives at states, so it could be easier to me to buy exhaust from europe.
While not the loudest I really like my Tubi system. ZERO drone and sounds like a proper V12. Make sure to get the pre-cats as well (not sure if your car has pre-cats). My current setup is OEM header > tubi precat > OEM cat > tubi.