From Ramair's current website: "It gives a dramatic improvement in airflow from the OEM filter which in turn leads to better throttle response, torque and more importantly horse power." (emphasis added).
To me this is quite an accurate statement. Look at Mike 188's bike. Talk all you want, the cost of three puny K&N2780 pods is about the same as a Ramair here in OZ. FFS you are buying an air filter for your bike, not a trip to the moon with NASA guys. There are a number which work well. This one also allows easy fitment and future maintenance of plugs etc. Pick one you like and buy it. If you really have a hotrod engine, it(ramair) may cost you 5 hp on 200. If you want that look with the claw on the side, the put up with the small power loss, or run no filter and suck shyte into your engine, it will lose power anyway after a bit of dirt goes thru. By far the vast majority of folk do not ever use the wide open throttle more than about 3 % of ride time anyway. It is a storm in an air box..