Thread: DIY Exhaust Mod – Gain of 10+ HP!!!
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Old 07-13-2009, 06:13 PM   #68
blue2000s
Porscheectomy
 
Join Date: Mar 2006
Location: Seattle Area
Posts: 3,011
Quote:
Originally Posted by joseph_number1
Sorry to be a downer....but would drilling the exhaust cause the car to fail emissions?
The addition of holes in the muffler tubing can't effect emissions. It will effect noise level.
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