I have had them in all my BMW's and my Porsche. The MAF issue is only a problem in over oiled filters. I have seen people soak them in oil. Use the oil sparingly and I have always wrapped the filet in newspaper overnight prior to install to get any excess off, just in case.

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Tim in Denver

04 Porsche C4S

05 Volvo S60R manual

20's are just fine in the snow you Baby!