Import Tuner did a dyno test w/ AEM cold air intake on a 6th gen I-4 & it made 4.5 wheel HP. i still have the issue & scanned the pics, it's from last year. but supposedly adding the K&N panel filter to your stock placement makes the same increase w/ the resonator removed - the cai will just make a louder sound, too.

it's funny how you hate the noise, becuz my WRX friend said my car is WAY louder than his car & he has the same intake. & he wants my ROAR.