Well after much indecisiveness on my part on which slip ons to get my girlfriend made the decision.
For Christmas she bought me the 4" models and I just installed them. While they are not much louder at idle they sure do have a deeper sound!
I have not noticed any performance difference either when compared to the Screamin Eagles that I just removed but boy do they sound better!

 

trying to upload video but i can't figure out how!

 

I don't believe you can post videos to the forum, only photos. I think you will have to post it on YouTube or some other 3rd party website and link to it.

 

I love my rinehart 4". I do feel like im running lean though. I had nightsticks on and all i changed were the slip ons but it sure gets hot.

 

 

 

I've have Rineharts on this and the previous bike. Love um !

 

Love my Rineharts. I have 4" on my 2015 FLHTK and I had 31/2" on my 99 Ultra. The 31/2"s were a lot louder when cruising. At the end of the day they about wore you out. You can make the 4" loud when you get on it. But better when cruising. At least in my opinion. But they both sound great.

 

Great choice! I don't think there's a better sounding slip-on out there.