my opinion is that oil impregnated cotton filters are good when no maf or a maf far upstream of filter and not turbo'd. hence oil shouldn't hit maf. these filters have good filtering abilities.
foam filters, high flow, no oil to worry about, but not as good at filtering.
that saying, jo has no filters on her twin 45'd pinto in the 7, and so what if engine lasts only 50k miles, quick rebuild and away we go again.
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2002 Bugeye WRX Wagon - deceased
1995 555 STi v2 track build
1999 RB5
2003 Blobeye WRX SL Wagon
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