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There are iPhone apps that will measure decibels. You could use one to get an approximation of how loud you are. There's no way you will be over 90 decibels from 20 feet away if you are totally oem.
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Borla axleback exhaust * mud guards * Michelin Pilot Super Sport tires * Opti-Coat * BRZ trunk lid liner * Rexpeed Wide Mirrors (heated)
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