2013 Dual Mode Exhaust
#2
It's probably the same setup that has been on the Vettes since the start of the C5 generation. All it does is has a butterfly valve open by the muffler when you step on the accelerator hard. The exhaust passes through a less insulated part of the muffler and is a bit louder. If you plan on upgrading to a catback in the near future, then this won't mean much for you.
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