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      06-27-2012, 10:56 AM   #11
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Drives: E90 M3 6MT
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Originally Posted by crabman
In a CAFE and escalating performance levels market OEMs have pretty much taken away the low hanging fruit so the days of mounting new cans or air filter housings (CA or not) and seeing worthwhile gains are pretty much gone on most cars. If you open up your hood and take a gander at the filter housing and its design a relevant degree isn't required to see its pretty darn good. IMO get the filter only if you want the slight increase with induction sound, otherwise skip both.
Actually there are some gains to the filter as well. Not much but it's there. The factory filter is very restrictive especially if you have an older year.

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