HKS hi-power on type S

[Bassprostimo]

anyone have a HKS hi-power on a type S? very keen on getting one however i want to know if its legal or close too. sorry if already posted

[Squalled]

https://www.youtube.com/watch?v=ZoSTpcZGjSA - Video for reference on how loud.

http://forums.clubrsx.com/showthread.php?t=768841 - Use this for a reference also.