Quote:
Originally Posted by Elombard
I think the exhaust primaries look so big because the entire system is double wall to keep noise and heat at a minimum.
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How common is this? I've never seen it done on another car. I...want this.
Here's an "air gap" pipe, but it doesn't seem to do any muffling, just thermal control (primarily for catalytic converter efficiency):
http://www.walkerexhaust.com/products/pipes-tubing/air-gap-pipe