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XfireZ51 · 08-30-2019

I have the FBI version of the Fusion system. Full open is most definitely noticeable as deeper, louder than closed. The C6 ran w/o resonator which was partly the purpose of the NPP valves. In place of resonator, using SW X pipe.
Very mellow at cruise and trailing throttle.

08-30-2019	#7
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,685	Re: Question about BBE Fusion mufflers I have the FBI version of the Fusion system. Full open is most definitely noticeable as deeper, louder than closed. The C6 ran w/o resonator which was partly the purpose of the NPP valves. In place of resonator, using SW X pipe. Very mellow at cruise and trailing throttle.