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Corsa NPP has no drone even catless with the valves closed. Open you get some drone around 2k rpm but not down in the cruising rpm.
I run factory headers, no cats, Borla 60608 resonated X, Corsa NPP. Sound is still really tame with valves closed and screams open. Smells great on E85.
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2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel |