A pod filter, unboxed on any engine is deemed an offence against the epa for the following given reasons by the EPA and Police:
1: Noise Pollution
2: Fume releases
3: Fire hazard
That's on an N/A vehicle, a supercharged vehicle, a turbocharged vehicle, a diesel, a car with a FMIC, no IC, or a SMIC.
Also, I've had a temp prob running before behind those headlights and measured air temps up above 40degrees celcius. That's a touch hot for my liking personally.