Originally Posted by M3NSCH
Those same states don't allow aftermarket exhausts, x-pipes, etc - so it's a moot point. That's why everything is "for offroad use only".
You have to "find a way" to not get caught in either case. Albeit, swapping back to a stock exhaust is much easier than taking off a supercharger.
Its not a moot point as your own post answered this very question..
Albeit, swapping back to a stock exhaust is much easier than taking off a supercharger
Thats my whole point..
In fact in Cali we are going to just a OBDII port read. As long as all but one readiness codes are green you're a go. No more sniffer..what gets me worried is if they pop the hood. If you had to switch back to the OEM xpipe, no sweat.