I went with the slimline duals and rinehart 4" slipons. Sounds pretty damn good, nice low rumble.

 

I went the same route on my 2018 RGS. I'm not normally a Rinehart fanboy because of their overwhelming popularity and my aversion to being like everyone else I ride with or meet. But I've been happy with the choice. If you're on a touring bike I always recommend going with a crossover or collector type head pipe 2-1-2. If you're looking for the best results after other performance upgrades and a good tune, it's hard to beat a 2-1. I'd never personally put true dual pipes on my bike unless I was seriously upping displacement, cam and compression.

 

just a Jaybrake fyi..... the sets that fit a 2014 rushmore will fit a 2017 and up also.... i transferred mine from my 2015 road king to my 2017 SGS .... Jaybrake said their was a difference,,,,,and there is... a 1/2 rubber spacer on the shift shaft.... as the housing on the case is narrower on the 107 than it is on a 103... thats it...you can make a spacer... i never did... perfect fit..

 

i ran the slim duals on the RK nice sound.. added their pro baffell to get a little more sound.... id say... not as loud as the VH... every set of those ive ran have been loud.... the slims sound like an old hot rod at idle..

 

You know its a good topic when its still getting responses 4 years later