Thread: question about headers..?
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Old 09-18-2010, 04:36 PM   #5
Failsafe Performance
 
Drives: 2008 350Z
Join Date: Mar 2010
Location: Oklahoma
Posts: 30
Quote:
Originally Posted by Hicompression View Post
You do not need a tune if you put longtubes on. I am running them with no cats, no tune and no check engine light.

There are ways to do it...
But is your A/F ratio optimized for best power?
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