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		986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > DIY Project Guides
DIY Exhaust Mod – Gain of 10+ HP!!!

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03-09-2009, 11:53 AM	#11
George in Plano Registered User Join Date: Feb 2006 Location: Plano, TX Posts: 5	Drilling straight back with extra-long bit What happens if you drill straight back and only penetrate the relatively narrow space of the central outer shell, missing the inner metal tubes? The result is an opening both through the exhaust tips and at the rear outer casing of the muffler. Good? Bad? Little or no difference? Last edited by George in Plano; 03-09-2009 at 11:59 AM. Reason: Want to add that this is an S- model year 2000

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