Well, I was thinking of a reply as I read... until I saw Rogers reply, so no point

other to confirm what he says, and all my knowledge/experience comes from Dynotech. The only think I would comment on, and I'm not going to argue(cause I can't), is Dynotech have tested all sorts of airboxes, and found no adavantage of having air fed to the same kit box from the front of the fairing compared to the kit type above rad, but having said that, Rogers airbox is a different design, and that could explain the differnce in power given the different routes of the air.
And Jake, in my experience you could gain up to 3bhp on a 'run in' zxr race engine over a just refreshed engine. I very much doubt you'd gain 9bhp with just a ramair box and bellmouths, I just don't beleive it, that's just too easy, there must be something missed!, just my opinion like
