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		986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions
headers and exhaust worth it?

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11-15-2015, 06:57 PM	#12
thstone Certified Boxster Addict Join Date: Nov 2010 Location: Los Angeles Posts: 7,669	The TopSpeed cat back muffler will slightly increase horsepower at the upper RPM's. Here is a link that includes my dyno test data. Bottom line: Net increase: +7hp @ 6150rpm. Peak +2 hp. All of the gains come above 5800 rpm. No appreciable difference in hp up to 5800. Spec Boxster Build __________________ 1999 996 C2 - sold - bought back - sold for more 1997 Spec Boxster BSR #254 1979 911 SC POC Licensed DE/TT Instructor

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