![shocked shocked](https://celicahobby.com/forums/images/graemlins/celica/shocked.gif)
a COI!!! That must be new. You probably never have to change or clean those filters.
![rofl rofl](https://celicahobby.com/forums/images/graemlins/celica/rotf.gif)
JK. With the CAI, the front side will get dirty before the backside, so I just rotated it after 5,000, and I'll do that every oil change from now on until it looks like it needs a cleaning. Just keep an eye on it.