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DIY Exhaust Mod – Gain of 10+ HP!!! DIY Exhaust Mod – Gain of 10+ HP!!!
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Old 01-16-2014, 06:33 AM   #11
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Join Date: Nov 2013
Location: Wisconsin
Posts: 35
Quote:
Originally Posted by JAAY View Post
I did 1" holes.
Also very interested. There is a hint of raspy or hiss with mine when cold, with smaller holes. You have to lean down by the exhaust pipe to hear it. Any nasty sounds with the 1" holes?
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