Quote:
Originally Posted by SliChillax
I have KN filter on mine and never had any issues.
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Not to get too far off topic but BMWs performance intake for the E90 shipped with a K&N filter so I'm not too concerned about using it. I have one in all my current cars and I have not degreased it. Straight out of the package and into the car. My E90 now has over 100k on it with K&N filters (I replace instead of cleaning and reusing).
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'07 Z4MR '22 GT4 '18 GT3 '16 GT4, '16 M2, '14 X1, '13 135is, '06 330i, '03 323 Ci, '01 330i, '99 M3 (RIP), '96 318is, some non-BMWs