I have the NPP on my new 50th Anniversary 2SS. I love the sound in Sport and Track modes, but was getting a nasty rattle when starting it up cold (especially in Turing mode, for some reason). Anyway, I took it in to the dealership because my "glow-tie" and cargo net came in (they weren't delivered with the car) and I mentioned the rattle. It turns out there is a service bulletin for the 2017's with the NPP exhaust. Something about re-seating the ceramic pins and using a loc-tite epoxy to secure. It's being done on my car this morning. Should stop the rattle. Will post an update after i get the car back.
Man...this car is AMAZING!
