I took out of my air filter and I think I may have flipped it... so I am not certain which direction the airflow should be going. Please let me know which way it goes!
I used a sheet of paper to determine the airflow direction with the fan on low, however this video should help- exact same as Kona EV
So that the mouse turds from when they're living in your air intake will slide out with the filter when you go to pull it out and dump it... _H*