The filter alone won't get you much if any performamnce. It's the jetting that does. The filter just allows you to jet richer. So put one in and you'll feel the difference, but not till you up the jetting. I'm jetted way richer in the needles than the bike would allow with the stock intake amout or even near it. I've tried to add intake flow in the past with leaner jetting than i have now and the bike just stumbled.
