Triumph never provided a dyno sheet for the RIII, yet I still believe their claims. Chevrolet never provided a dyno sheet for my Camaro, but I still believe them when they say 328HP. I don't provide readouts on every note of a piano that I tune, but my customers are happy with my tuning.
How about you buy one, get a before dyno readout with OEM filters, and then get it tuned with the RamAir Filter and no other changes, and if the results aren't better than the stock setup, I will buy the filters from you for what you payed for them.