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Shouldn't have any drone with the valves closed. That is what I liked the best about this exhaust aside from the deep tone. It has the biggest variance going from closed to open. Most of the other NPP exhausts are loud in both modes.
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2016 NFG 1SS A8
Options-2SS Leather/NPP
Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP
Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA
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