Make sure you put a screen in the ram air too to prevent birds from entering your engine bay at high speeds
Drifter, you could probably go with a smaller diameter metal pipe so the stock "accordian" tubing could fit over it...but I'm not sure, I don't have it in front of me.
That sucks that cops are so damn picky. Maybe if you found that the accordian tubing didn't fit over it, you could cut it and wrap it around the pipe and clamp it around it afterwards. But if you kept the stock box, and had a pipe run to the stock box, you think cops would care? Maybe paint the pipe black? Just throwing out ideas