K & N filters

I like how people dismiss the fact that those of that use them do not have problems, yet they insist that they are no good because a very expensive airflow machine says they are no good! I'm using real world testing as are many of us! I guess we just don't know any better! Sorry, but i'm taking what i know from my own testing (actual use) and it shows it works great with no issues!

Some people just refuse to change or believe real world testing!