16 2013 Shelby Gt500 Total Package
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Obviously the dual-tip mufflers are a '13 GT500 trademark, but in reality the front half of the mufflers is carryover. The rear of the muffler was reworked to reduce backpressure via the dual outlets and provide the desired rumble. But don't think the dual outlets are window dressing. Their extra volume got rid of air rush noise--the mad-cat hiss--at full throttle. View Related Article
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