Is the plastic tube that runs from the filter box to the throttle body as warm as the one you made? If it isn't getting as warm as your first intake tube, it might be worth insulating it as well to try and keep the air warm all the way to the throttle body. You might even be able to slip the factory inlet tube inside some of the metal ducting you used. If the plastic factory inlet tube does get warm though, well then just ignore me, Lol.
Looks good though, great idea.
