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Sounds great! I'm hoping their NPP replacement will be even louder when open but just as quiet when closed. I'll be interested and on the waiting list if Borla does a proper NPP replacement setup for us A8 guys, meaning an option for upstream AFM valves, and valves that don't buzz and rattle would be wonderful too. My NPP has already been replaced once for passenger side valve rattle. Now the new one has hit 1k miles and is rattling just as bad when closed.
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2016 camaro 2SS hyper blue/Kalahari, A8, MRC, NPP, sunroof, SW headers through axleback, Circle D 3600rpm TC, Pray ported IM/TB, E85
Sold: 2002 Z28, NBM, M6, 460rwhp, 2009 HHR SS
RIP : 2002 WS6 Black, A4, 355rwhp
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