[surfbeast]

While polishing mine for looks ( the outside ) i noticed how rough it was on the inside. I used a die grinder with a sanding wheel with 80 grit and sanded/ported the walls down smooth. then went to finer grit to get a polished finish. It opened it up quite a bit and had to help air flow. It took all of an hour to remove port and replace. I'm sure I could have opened it up even more but I got to where I felt comfortable and left it at that. Also added an intake spacer while I was at it.