I know a friend of mine that put a FlowMaster (Either a 40 or 44 series) on his Hemi. It was L O U D..... I have the FlowMaster 50 series with a catback dual exhaust out the rear, as my truck came with single exhaust. I L O V E the sound of the 50 series. Especially when cold started. After about a couple weeks, it got a bit louder and is just the right loudness for me. My sisters Niece, has a 2018 Big Horn which is a lease and she opted to put the special 50 series muffler that's made by FlowMaster to interchange into the existing exhaust and IMHO, I like the sound of mine better due to her truck still has the Resinator installed where as mine, does not.