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I've read that the some cone filters and cold air intakes can actually rob power from our cars (even though they sound great), so I don't want to go that route.
My question is: do you get any sound benefits from the drop in filters? Or does the box muffle the sound too much to notice?
Second question: is there a preferred drop in? I've heard the oiled ones can foul up the MAF sensor, but I think that is only because people when they clean them over oil the crap out of them. Will a new filter foul the MAF? It seems the oiled ones actually trap more particles. You don't want dirt getting into your engine, into the oil, and wearing parts. So it's important to have a good filter.
Lastly: what about removing the other filters from the air box? I heard there is a carbon filter in there as well. Is that good to remove?
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