The "green" noose has been tightening for the past 15-20 years at a faster and faster rate. Nationally the regulation has been getting stricter, too, so it is not just State regulation. With the sophistication of the communication systems that are being used on new vehicles nowadays there will be a time in the near future when our own vehicles will snitch out any attempt to modify from factory settings anything that effects emission output. Maybe they already do?
Once while in the scale house here in Cordelia about 20 years ago I was chatting with a CHP Officer, and he was monitoring a bank of computer screens that I could not see. I asked him about what he was doing, and he proceeded to tell me that he was able to monitor vehicle speed, weight, registration status, and even emissions data because of communication data links that were imbedded in the roadway on HYW 80. He did say that it was limited to the newer vehicles at that time and to the transponder linked HD trucking. No doubt that the number of vehicles that have communication ability has increased significantly since then.
Keep in mind that nowadays whenever one is involved in a vehicle crash with newer vehicles the insurance company and the police will plug into the vehicle and download the data that was stored relating to the operation of the vehicle prior to and at the moment of the crash. It can supply not only vehicle speed, but also APP, steering wheel position, % brake application and accelerometer data just to name a few. I own a '17 Mustang GT which will log 0-30, 0-60, 0-100 times, braking performance, accelerometer, and has a line lock. All of which I am sure that my insurance company would be really interested in were I to be involved in crash incident. Not to mention the police or CHP. It is also equipped with a Navigation system. And, it has a location device that can be used to shut the car off remotely in the event that it is stolen. So, do I think that it is "communicating"?
Make sure that your tunes are blessed by the smog Nazi's or be willing to dance for their band if you get caught is all that I can offer. I know things were different back in the day, and I know that bombers going to bomb. Just saying.