I just snagged both a stock replacement and a cone K&N with an adaptor and spacer. I had one in my M10 and can't say that I noticed an improvement of any sort. I'm also aware of risks using too much oil and of course with the cone you'd want a heat shield.
Other than sound which means zero to me I'm interested in input on the pros and cons before I decide to sell one or both
Other than sound which means zero to me I'm interested in input on the pros and cons before I decide to sell one or both
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