Arkay

My only objection to the pulling the NPP fuze or the wild side of the Mild-2-Wild is highway uphill harmonic drone can get annoying. I just checked NAKIPARTS web page at

http://www.nakidparts.com/id25.html

for the NPP "Mild" Adjustable SoundKit. i would like to hear from someone using the kit to see if running with the NPP flaps at ~25% cuts back on the 70 mph uphill drone.

Dick

smurfkiller

hmmm interesting. i put npp's on mine but have held back from buying the npp in a box because closed mode sucks. so this gives you the ability to adjust how far these would actually close in quite mode.
for some time i zip tied my valves about 5/8 open was good but to quite for all the time i think this and a npp in a box is just what i need.
its christmas anyone want to get these for me? i have been good this year.

jimmie jam

I installed NPP's on my car years ago and purchased one of the first versions of NPP in a box. It's still "in the box". Open is where I would leave it so that's why i've never installed it.

Arkay

I know what it sounds like open. Still waiting for someone to comment that has the Adjustable Sound Kit installed on how the uphill drone is with a ~25% setting.