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Old 03-03-2013, 06:36 PM   #4
Tran
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Drives: 2010 Camaro of course....
Join Date: Apr 2006
Location: NE baby
Posts: 5,616
Interesting to see in the video that upon startup, the exhaust gases only come out of the two outside pipes. What we're seeing is that the two center pipes contain butterfly valves which close up after startup (they actually open for a second then close) , and gives us that nice loud startup sound.
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