Interesting question. Thing is, it is almost entirely a local issue. Texas has no limit on the noise from mufflers, but that is not quite as good as it sounds. What it means is that the police can decide what they feel is too loud. Actually that is still ok as it turns out, cause I know a lot of motorcycle people and far as I know, nobody has ever gotten a ticket for loud pipes. I would just ask around your area. Call a motorcycle club and ask your question. It's going to be like speeding on the highway. If you are a lone wolf out on the highway going 80 mph in a 70, you might get stopped. If you are in among many other people and all of you going 80 mph, nobody gets stopped. In other words, don't be the only one around with a loud pipe and you will probably be OK.