The Pipe Thread (aka: Aftermarket Exhaust)
We just put a Two Brothers on my sons '05 CBR 6RR. We looked and listened for about a year before we decided. It's difficult to listen to sound clips and get a good idea of what you want. Same thing with an exhaust for the M3. Anyway, the Two Brothers with a PCIII didn't really produce much new power but it sure sounds sweet. We made the right choice. This pipe has attitude. A bit edgey. No bounding, no rumble...just tenor. Much better than the Yosh.
When In Doubt...Charge!