This is a K&N air filter I pulled from the R100RS. It's supposed to be cleanable but I'm not buying it. I don't believe that all that dirt is ever coming out not matter what I do to it. That means either restricted performance or dirt will be getting through to the engine.
This is an OEM BMW air filter. Free flowing and certified by BMW to do the job correctly. Clean air and no restrictions. Properly balanced for the carbs and intake system.
Price is not on K&N's side either. ~$90 vs ~$35. You would have to clean the K&N 4 times to save any money and who wants to do that dirty job? Plus it's never going to be as good as a new one. You wouldn't reuse the oil filter, why is the air filter any different?
They have a great advertising campaign but nothing else to offer in my humble opinion.
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