I'm running OEM's with the latter two baffles removed. Sounds a bit like a Ducatti, nice rounded sound with depth but not too loud. Approx on a par or slightly louder than TOR's though deeper resonance, fine running around town at ~3K rpm. Bike ran leaner, so I went with the Freak kit to bump air flow and jetting.
My advice, get a professional with the right tools for a surgical, tidy job. Personally I like the OEM's look and lustre, so very happy with this outcome. Good luck!
