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It depends on how much water you pull in. In the case I am referring to, had he had a simple paper filter it would still have allowed air to penetrate. But the foam filter in front of the paper filter absorbed enough water to shut off air flow to the motor. It doesn't take much to soak a foam filter and make it impenetrable. If you suck water straight up the pipe, it doesn't matter what filter you have, you have dramatically increased the odds of scrapping a motor. But for light ingestion, a cone-type or round filter with a gauze or paper element will allow air to penetrate in spite of in most cases. BTW, there was no water gathered in the air system, just the foam filter cover. We had to rip it off to get the engine running again and have enough air flow to keep it running. Just an FYI from someone who has had to pull as well as be pulled for just such problems. You can do with it as you see fit. Again, if you don't drive in water, it doesn't matter.
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