Some background...my previous bike was a 2010 Limited. Stage 1 only, but had VH true duals and Rinehart 4" slip-ons and CFR slip-ons at one time. I loved the CFR's ( sounded more like a muscle car rumble than "potato potato") but cruising they were almost too loud...so switched to Rinehart 4" and it was still loud but not as bad cruising. Fast forward to now...I have a 2018 CDH and while I dont have true duals, I have the X-pipe and Rinehart as well as St2, but the bike isnt as loud. Yes, at idle, it has a sexy lope but cruising, it just quiets down to a deep rumble, which admittedly I like, but wish it was the same deep rumble, just a little louder. Are the Rineharts for HD different internally than the Indian versions? Is there something different about the valve train on a HD or head design that makes it louder? My riding buddy has a 17 Roadglide with the VH X-pipe and Screaming Eagle slip-ons and his bike drowns mine out sitting side by side. I dont really want to buy new slip-ons but just curious if there was some mechanical or simple reason.