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Old 08-19-2013, 07:33 PM   #7
thahemp
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Drives: 2012 Black LS3
Join Date: Jan 2012
Location: Derby, KS
Posts: 4,343
Quote:
Originally Posted by caverman View Post
You won't get a true 3" system unless you buy one. I think KOOKS and LG are about the only ones that make a full header to exhaust tip in 3".

Most headers and cat-backs have a 2.5" connection point.

Unless you're making really big HP I wouldn't worry about going to a full 3" system. However, a 3" will give you a little bit of deeper tone when idling.
Lots of companies make a full 3".
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