The dremel idea was great, you use one of the sanding cylinders and it really takes the ragged edges of the charcoal filter off the inside edges of the airbox quickly. I used a K&N, and wiped down the excess oil from the rubber edges. Based on //Matt's comment, I'll be extra careful when I refresh it to make sure it's not over oiled.
2013 335i M-Sport 6MT
Estoril Blue | 19" 403M Wheels | Black Leather | Aluminum Hex Trim | Cold Weather Package | Dynamic Handling Package | Technology Package | Premium Package | Park Distance Control | Harmon Kardon
Last edited by Boondoggler; 11-13-2006 at 11:32 AM.