Comment by elric

They're not? Over here, periodic car inspections are mandatory. New car models can't be sold until they've been checked and found to be compliant with various regulations, presumably including loudness. I guess there will always be "car enthusiasts" who think that LoUD pIpEs sAvE LiVeS (they don't), but I don't see/hear heavily tuned cars anywhere near as often as in the early 2000s.