<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by H2 Rocks:
AirAid intake systems are way over-rated. They boast that they use incoming outside air, But the design allows heated air in from the engine compartment. If you tow any toys, this tends to heat the engine more than stock filter boxes. If you do any off-roading, water can find its way into the Air Aid Box. The stock air intake only allows outside air in thru the air intake hole and it's covered so water, mud and such can't get on the filter, unless you submerge your car. ( not recommended with any filter) One more thing, the Air Aid is VERY NOISY from too much vibration. Horsepower increase is not worth it, and it's not noticeable if you pull a trailer.
Try a new filter in the Stock box if you want.
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Look into the Volant intake system
http://www.volantperformance.com/pdetail.asp?ID=90
The box is sealed or at least has a lid to keep out hot air, dust, and other unwanted stuff. It also makes a nice seat when working on the engine. It uses the same type of filter as K&N or many other systems on the market.There is also no issue with clearing the fan with the intake tube as there is with some other systems. I have seen a 3mpg increase since installing mine went from 11.0 to 14 on the high way, some of the increase may have been from a combination of things like the headers and the Corsa exhaust.