Tag Archives: air-filter

Cleaning a K&N Air-filter with 230K Miles

clean k&n air filter

To say this K&N Air-Filter had lived it’s life would be an understatement. The air-filter that was on this E36 M3 was one of the worst air-filters I’ve ever seen. Normally a K&N air-filter is a reddish color, this one was black. I was going to attempt to clean the …

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