Hey bro, I have an 05 as well and was eyeballing that same akra megaphone. I don't think there's anyway to baffle it more as the housing for that exhaust is so small already. I want to get akra's shorty for the new gen R6 and see if that will be more effective baffling out the sound. I'm guessing your megaphone sounds pretty much like a straight pipe? Here's my question to you though.... what all work did you have to do to get the magaphone to fit the midpipe's OD?