986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Top Speed Pro-1 Catback Exhaust HP Increase

ekam · 04-22-2014, 06:14 AM

I thought who he must be obeyed said most aftermarket exhausts lose as much as 15hp...

04-22-2014, 06:14 AM	#6
ekam Registered User Join Date: May 2008 Location: Toronto Posts: 2,656	I thought who he must be obeyed said most aftermarket exhausts lose as much as 15hp...