Thread: Convertible Exhaust Butterfly Valve - Service Bulletin
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Old 02-05-2013, 09:21 PM   #3
tonyko1
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Drives: 2012 Camaro 2SS/RS Convertible, IBM
Join Date: Jun 2012
Location: Oregon
Posts: 1,015
I sure did notice how quiet my car was at idle, barely got a rumble at start up.
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