Took my 14r for it's 600mi service yesterday and while it was up there,let the mechanic put on the pipes( think he charged like $25.00).It was late when he got done so just rode it home but I notice at idle at the redlight and taking off in 1st it's fairly loud but in 2nd from about 2.5k rpms up it sounds pretty good.I got the blk series aluminum and I don't think it looks too bad.I'll post a picture later if I can figure out how.I told him to just snip the wires at the servo motor like I did my n1k but he said no wires to cut so I guess there's no servo motor or if there is, it's before the pipe joints.Highway speeds sound great but taking off in 1st doesn't sound like my n1k and to me,not that great.Anyone looking at the TB's might want to keep that in mind.I'm riding today so I'll see if the sound grows on me lol.