[bjoli]

Not if they are driven on european roads. Any car made after 2018 (??) can't have them. I know mercedes AMG plays an modified/amplified sound inside the car, but the new regulations in the EU forbids any new car from having this.

There has been talk about a labelling similar to environmental zones (which means older, dirty exhaust cars can't drive in cities) as well, meaning loud cars would not be allowed in cities.

Edit: oh, and everything louder than 72db, 0.5m from the exhaust at a 45degree offset, is already forbidden for cars iirc.