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Old 06-12-2017, 07:35 PM   #5
Alpha1BC

 
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Drives: 2017 1SS 1LE
Join Date: Jun 2016
Location: Detroit, MI
Posts: 1,000
I never dyno'd mine, but I never noticed any power gain. I'd be surprised to see any significant HP gain without cats/headers changing, but it definitely sounds good!
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2017 SS 1LE.
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