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Old 05-07-2013, 01:05 PM   #3
slick rick
SoCal Mayhem
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Drives: 2010 Camaro 1SS/RS
Join Date: Aug 2008
Location: Foothill Ranch, CA
Posts: 5,488
Originally Posted by asprex View Post
Could someone with a dual mode exhaust post pictures of the vacuum valve and vacuum source for the muffler valves. I'm installing the NPP exhaust on my 2012 ss and have not seen a factory install. Thanks.
The back of the LS3 intake manifold has a vacuum port

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