Originally Posted By: modularv8
............I just took a peek with a flashlight inside the airbox and there was a thin layer of fine dust all over the intake side of the filter air-box. .........................From the dust pattern, it appears to be seaping past the air filter seal (felt on this application). .....................Don't know how many folks actually check the inside of the air intake past the filter to see if dirt is making itself past the filter, but checking it with a flashlight was revealing. Just an FYI.
When I removed the Wix filter from my Subaru a few weeks ago to install a Fram, I also saw a little bit of dust on the inside of the air box. I did not see any obvious leaks like you did, so I'm not sure how the dust got in. And the UOA results I got yesterday showed only 6 ppm of silicon, and normal aluminum, iron, and chromium. So it does not appear to be a problem.