Straight piped trucks can easily hit over 100dB (I've seen numbers as high as 118dB) which is well above the 85dB hearing damage level, and is at the level where hearing damage occurs in minutes or even seconds of exposure.
Sorry I don't want to get tinnitus just because some asshole wanted to make his truck "sound better".
Sorry I don't want to get tinnitus just because some asshole wanted to make his truck "sound better".