@DynoMax Exhaust, I just installed one of your 39537 muffler delete pipes on my 2019 JL. There is one issue with the fit. On the 2019 exhaust pipe there is an anti-rotation stud. I had to grind a clearance slot for it in your pipe in order to get it to slide all the way on. I don't think the 2018 exhaust had this stud.