Is there any problem running a pre-filter over the Mugen filter assembly? I'd like to slap one on but I was frightened it might restrict airflow or something. Any negatives to running a pre-filter? I've never seen anyone run one on one of the expensive engines so I've been nervious.

By the way, your buggy is looking flawless. I like how you did the pipe hanger also. What type of rod did you use?