Three 2018 RGS owners here - including mine. All of us put the Rinehart 4" Classic mufflers on, and I went one step further with the Rinehart slimline duals header. I'm no Rinehart fanboy (and in fact have actively avoided them in the past), but IMHO all of our bikes sound better with the Rinehart mufflers installed. It's not something you notice when you're sitting on the bike, or even from the side, but from behind you can tell a difference between the stock cans and the Rinehart cans. Now that all of our bikes have 3K to 4K miles on them, the Rineharts sound even better.
They have a fairly deep tone to them, not as raspy as Rineharts on earlier year models (this is my opinion only). They are tame at idle but sound great when you crack the throttle - again something you really don't appreciate unless you're riding behind them, or standing behind them and having someone else crack the throttle for you. Quality is great as usual. One thing that surprised me on my bike, is that even with the Rinehart slimline duals header, my bike doesn't sound much different than my two friends that have just the mufflers. If I had it to do all over again, I wouldn't have spent money on the header and been perfectly happy with a muffler change. Performance doesn't seem much different between all three bikes, and since I put on a high flow air intake and the headers I had to have my ECM flashed with the PV. My bike feels like it lost a little bit of low end torque below 2500 RPM, but gained it back from there up to 4000 RPM.
My fuel mileage suffered a little bit as well. Live and learn.
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Last edited by wevsspot; 09-20-2018 at 10:32 AM.