PS. Next time you're doing some dyno work, place your finger near the top edge of one of the velocity stacks and watch the power output drop-off big time. This is absolutely the worst place to place a filter because it turns laminar (smooth) airflow into turbulent flow.
I agree 100 percent with this, a bell mouth needs un obstructed airflo over a smooth rounded edge, the air being sucked into the bell mouth does not come from above the mouth but from the sides.
Chris
