I know they issue a fine, suspension of licence and impound of vehicle.
All of which you have to pay for... and plus...
you get charged for the storage of where your car gets impounded,
and its charged PER DAY.
AND after you have done the time there is a final payment for
releasing the vehicle, which they call :"the admin fee".
This happened to this guy that i work with.
So yeah..... after vehicle was released,
ALL mods done to the car had to be removed
and everything had to be back to stock (exhaust, intercooler, BOV, etc...)
and you have to get it inspected by EPA before you can drive it around.
AND PLUS EPA fees too....
After paying for everything, you might as well
buy a new car!!