...if you want to piss off the world.
Just wanted to put in my 02 cents on anyone thinking about it. If you live in a nice community I'd expect a letter from your HOA doing this.
I'm catless and sure that adds a bit to it but its quite loud and really not a controlled/good sounding note. The rumble at idle is fun but it lacks that refined sound under WOT.
My M5 exhaust is coming and I wanted to install my M5 diffuser so I got out the saw and did some quick hacking just to see what it's all about. Really looking forward to that M5 note and deleting my resonators.