These Mods Could Make Your Car Too Loud To Be Legal

Car mods that are illegal in many states include straight piping your exhaust, using muffler cutouts or bypass valves, or ...
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GTI Cold Air Intake Sounds Like Silence - VW Mods

My 2012 Mark 6 Volkswagen gti has a NueSpeed Cold Air Intake system on it with a K&N Air Filter. It helps deliver more air ...