i came across a small import tuner shop around china town and these guys have knock off aem cai's for mazda3's. same bends, same pipe (2.5'' i think) its just not all polished with the AEM logo. (obv.) so yeah, the guy told me 130 for it, which in Canada, is less than half of the AEM cai. One problem, it doesnt come with a filter. (tricky asians) What filter should i buy that will give me the most noticeable increase in power and tq... all this being said, i dont prefer the AEM cai's, i like the f2's.. dyno says it all but they are not in stock and by reading around this forum they are never in stock? so i will settle for this aem knock off specially for the low price. any suggestions for the filter ..?