The Needswings Devil Horns are about the most sanitary way to squeeze the piping through the core support, and apparently they assist lamniar effect, thus helping the engine breathe slightly better. They've been on my short list to purchase for a year now, just have never done it.

At the moment, my passenger side tube is passed through the core support via some 3" fuel hose, but the tube on the driver's side stops just short of the support. It sucks in hot air ever so slightly, so I try to combat this by driving as fast as possible at all times.

The 320 box is a substantial increase over the N/A box. With K&N filters, the thing breathes quite nicely.