There is nothing implicitly wrong in chasing peak hp numbers, if that is your interest. There are plenty of dyno queens and keyboard racers out there.
However, the "area under the curve" is where my focus is when I am considering any power adding modifications. What will the average hp gains be? Will the powerband suit where I plan to spend most of my time? Am I trading power for response? etc. How much is the total cost? What other advantages might it offer, IOW, what are the trade-offs? Lastly, who has verified the results and what is their feed-back? +/-
Practically speaking, I would love to know in advance how much hp/$ we are expecting to gain from a bolt on exhaust with or without dyno tuning? Although I really can't imagine changing flow without re-tuning the bike.
Gavin raises questions that I was wondering about myself. Asking why AR's part improves performance over another deserves an educated response, in a professional, and (ideally) friendly manner. If the tube diameter is the same, are the bends greater radius, or shorter length, etc. It isn't really much of a secret, but more of a design/package trade-off. There is no single BEST exhaust for ALL conditions, hence why AR provides the optimized dyno conditions in which to test their design.
Unfortunately, neither of my local dyno shops have the cfm capable of creating the needed ram air effect to be able to validate AR's claims. It might be easier just to state the sustained speeds in excess of XXX mph are necessary to observe a significant difference between this exhaust and the others.
Using apples to apples means including the total cost vs. expected performance gains. If the results can only be reproduced on a limited number of dynos (must be ram capable) then that should be clearly stated, to avoid both the disappointment and wasted dyno runs.(e.g. $$$)
I am looking forward to dyno verification of AR's claims from a neutral third-party.
GL OP