The only major restriction in the intake after the filter is the airflow sensor. Then it's the intake manifold. Intake tubes are large enough not to create any restrictions. So when you change the filter, you alleviate the first and easiest blockage. That's why drop in filters add 5 hp in some (emphasis on some) cars. Yeah a full CAI is the best way to go, but if you are a cheap SOB like me, you just do the cone filter.
The alley behind my dorm flloods at least 4 inches every time it rains hard. I would never drive a car with a CAI through that. If you by the bypass valve from AEM though, you can drive through water confidently. It's another $50, but an engine rebuild is way more expensive.
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"I really like going fast. Just go off and meditate in the wind, you know? As corny as it sounds it works and feels good. It's a good way to just let the weight of the world off every once in a while...is this a big pose? I mean, yes this is a pose! I mean am I driving down the street to not get noticed in this thing? I mean rebellious is what this thing is I would say!!!" -James Hetfield
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