Thanks for your write-up. With my Scat Pack (6.4L), the active exhaust is open when the engine is not running and during cold start up. The Hellcat is likely the same.. . . And the exhaust? How is this thing legal, especially in states like California? Before I got the car I was considering cutting out the mid mufflers like some have done on their 2015 392s, but I seriously don't think it is necessary. The car is just plain LOUD. You have to experience it for yourself. On very cold starts, it's even LOUDER, which I couldn't believe it would get any louder. . .
One of the many reasons I wanted a 2015 is for the active exhaust. It is just awesome that a car comes from the factory with an exhaust like this.