Installed on my 2013 Dodge Ram 1500 with 5.7 Hemi about a week ago and it sounds great. Unfortunately I get a horrible hum between 1600-1900 RPM, which is exactly what the engine is running at when I'm cruising on the Autobahn. My muffler shop tried various ways to fix the problem but nothing worked and I have no choice but to return the muffler. The muffler itself is of excellent quality and as mentioned the exhaust sound is amazing, it just didn't work in my truck.