All reasonable points you make there.
I'm not worried about "minuscule differences", but for me any mod which resulted in ≈2.5% drop in HP is something I'd wanna know about prior. I think its worth noting that whilst systems like this do have great visual appeal, and obviously (especially in the case of boomtubes) shave off weight, in the absence of any actual measurements to the contrary, anecdotal evidence suggests that these aesthetic/weight benefits come at the cost of a little HP.
i agree. you should know all the facts, then decide. i was aware the power drop, but i decided to go with the boomtubes anyway. i do not go to the tracks with my bike (not yet, anyway).
also, the boomtubes are a long wait now because of all the misfortunes that happened around mark this year.