well guys, the race for first firing up these pipes is not over yet. the headers don't fit on the left hand side of the bike. i tried all sort of things, looked up a bunch of stuff and traded a few mails with enrique. bottom line: he made them for a K and they don't fit the F with its different configuration of kick stand, centre stand and passenger pegs. the difference is too much to bend them in place myself.
that's disappointing as i very clearly stated i was mounting them to an F and pointed out the difference, even offered to send measurements. oh well... let's see what he can do. anyway, i won't hear them rumble just yet.