I would think the angle of entry on a cone would be easier, much like smoother bends in an intake or exhaust are a good thing for the air flow. On a cylinder, the air has to come in, hit opposing air directly, and have to take a right angle into the pipe. I would think the angle of the airflow for the cone would make it much smoother air flow, but then again, I'm just guessing here. Also, like a few said, I doubt it matters much to even notice. :3_bier: