Thread: Best exhaust, header combo?
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Old 07-30-2013, 08:39 PM   #6
the_fast_one

 
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Drives: 2017 red hot zl1
Join Date: May 2012
Location: IL
Posts: 857
I run npp and kooks 1 7/8 with out cats. I love it. Just search you tube for different combo and find what you like
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2017 ZL1 built by GPI. Way to many mods to list 855rwhp/720rwtq
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