I have CFR slip-ons, but haven't rode with them. They do sounds fabulous in the garage. I also didn't want to spend $300-$500 in a tuner as im not planning any motor mods and im leaving the Factory cat IN. After a lot of research, i decide to go with Nightriders FL-Vied-10 http://sales.nightrider.com/fl-vied-10.html IT will add 6% more fuel and keep you out of the LEAN mode for the EPA standards. Priced right to, $126 shipped.
Thanks for posting that! I called them and spoke with Steve for about 30 minutes. He was very helpful. He told me that they made this product "Homer Simpson proof", meaning that it's pretty well dummy proof. It looks very simple. He told me to set the dial to 75%, plug it in and run it. It will add fuel to the mixture to reduce heat, reduce exhaust pop and add throttle response. For $126 shipped, seems like a no brainer. I ordered one today. He told me that the 2014 SG ECM compensates for 98% of the adjustment when you switch out slip on pipes and his product helps out with the small adjustments left over. Let's hope he is good on his word...