I've had fmy AF1 for about 10,000 miles now and the filter color has gone from blue to a dark grey almost black color. How often should I clean the filter and what should I use. (I lost my manual for it and was wondering if anyone could help me out.)
Thanks,
Kyle

 

Hi.

Check out the AF1 website FAQ section:

http://www.airforceoneperformance.com/bin/faqs.php

Cheers
Bubba

 

Thanks

 

Thanks here to!!

I have 20,000 on mine and I just realized it, cleaning it now!!