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I have the Magnaflow cat back w/NPP on my 2SS. Heavy drone 1500-2000 rpm. Nobody in the house likes riding in the car anymore. Only sounds great on the outside. Issues with NPP/AFM cams slipping (geometry off on the mounting flanges maybe). For this I have video.
Currently my NPP is disabled with the AFM valves hanging from zip ties. If there is a plus it is fit and finish only.
In the market for Borla or Corsa.
Not saying you'd have the same luck with the RS, but do your research.
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