I always heard that having a free-er flowing intake, or a larger intake would only make any kind of noticeable difference at WOT, and my car stays at very, VERY low rpm's. Although it could be a bit of door #1, and a little bit of door #2, I'm not a scientist
Also, the intake tube part I took off is roughly the same size throughout, and the same size as the opening on the car now, but it pointed towards the front passenger side of the engine bay, away from the heat of the engine.