Thread: How much hp increase with after market parts?
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Old 06-05-2011, 01:07 AM   #27
mikeSS


 
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Drives: 2015 c7
Join Date: Nov 2009
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Quote:
Originally Posted by 14pilot View Post
  • K&N Race Filer = No gain
  • GM performance headers = They don't exist so that'd be no gain
  • GM peformance exhaust = No gain
cant believe the bad info on this thread .
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