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I have the Borla 60608 mid pipe going into the Corsa NPP and it sounds amazing. I don't have headers yet but I do have primary cat delete pipes. With the valves closed it's as quiet as the stock NPP but open it screams pretty good. I do believe I can install headers now and the volume levels will be completely tolerable with the valves closed.
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2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel |