There is actually a primary set of valves upstream of the mufflers I believe specifically to deal with V-4 drone when AFM is active. NPP will also get you the additional butterfly valves to open up all 4 pipes as you can see on some of the Geneva videos at startup. I think the NPP on all the show cars so far sounds awesome. Best of all worlds, quiet cruising without drone then wakes up when you nail the throttle and/or switch modes into Sport or Track. Sounds like a winner to me.
