Originally Posted by
bentgear
If you are wondering about dirt getting thru the filter there is an easy test. Lightly coat the inside of the rubber tube with oil. Check it very once in a while by running a Q Tip along the inside. Any dirt that gets by the filter will tend to stick to the oiled tube.
Nice idea, I'm going to have to try that one out.
Currently I am washing and reusing foams with the K&N stuff. No longer have my motorcycle that I bought it for so may as well use it right?