Thread: Installed Kooks headers today
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Old 04-10-2014, 08:40 PM   #11
Blown355

 
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Drives: 2017 ZL1 A10
Join Date: Sep 2009
Location: Austin TX
Posts: 866
Quote:
Originally Posted by 2011shelby View Post
Do you have a before and after dyno to compare gains??

I had a decent gain when I added long tubes.
Probably not going to dyno it again before I put the 9.55 crank pulley and FIC850's on.
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