They are technically illegal, but can be permitted.
...as suggested above, unless you have an actual need(BIIG turbo and power), just a pod would be a step backwards from a factory airbox with good panel filter and inbuilt cai.
__________________
MY99 WRX EJ2.35L 720whp 9.48@147mph
https://youtu.be/c_lYEG0_Dyo
|