Out here, we have a problem with people who install loud exhausts on their cars. These are usually small cars like Hondas, Toyotas, Subaru's, etc. and are typically driven by young, male, runts. Typically the car exhausts have a very large diameter exhaust pipe. They are loud and when they put the petal to the metal you can hear them 1/2 mile away while you are inside your home with the windows closed. They are very irritating.
I'm looking for suggestions for something I can put inside the exhaust pipe that will shut 'em down. I'm thinking something like a liquid that will expand inside the exhaust system and harden. Maybe like spray foam insulation.
Obviously it would need to be applied while they were not in the car and while it was parked.
What would you suggest? Any ideas would be appreciated. I would rely on the local police to give them tickets but they do not seem to be interested. I think there are state laws against such noises but obviously they are not enforced since there are thousands of them on the roads locally.
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