my friend went to bertoli, a famous factory for sport exhaust...
he took his 35i to the chief, and said he wanted a better sound retaining the original mufflers.....and the original configuration as much as possible.
1 removed the cat and installed free-flow-catalysts with 200 cells,
2 opened rear mufflers with laser cut machines, removed something and welded mufflers back to the same welding points...
this is the sound.
I hope you like the sound....
about 1000 euro to do this little mods......
Francesco