Ive had the filters for over a year now with no adverse affects. Just remember you need to clean them when you clean your cone filters.
As for the catch can.... I cant see any value in it. Im not running E85 so I don't get the black goo but otherwise I've seen a light film that barely messed up a tissue
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2017 Alpine White M2 DCT- Stock ... for now
2010 135i Sport with flipper paddles. Cobb Pro tuned by Kozmic Motorsports- "slightly modified"
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