Is Loud Exhaust Illegal

Unfortunately, there is no national law that vehicle owners and exhaust manufacturers can reference to make sure their systems aren’t too loud. … In some states, such as California, the maximum sound level limit for vehicle exhausts is 95 decibels when measured next to the vehicle.

Is it illegal to have a noisy exhaust?

It is illegal to modify a car’s exhaust system to make it noisier than the level at which it passed type approval with. … Most cars over 10 years old will not need vehicle approval however, including imports, so it’s unlikely a classic car owner will know for sure just how loud their exhaust is.

Can you drive with a loud exhaust?

Driving with a loud muffler is potentially dangerous. If your muffler is loud because of a hole, rust, or other defect, carbon monoxide may be getting into the cabin of your vehicle. Carbon monoxide can be dangerous to you and your passengers.