I have the HD heat deflectors on my 15 SGS. I can't say that I notice a difference in that there is less heat, as this was never a problem for me to begin with running a full aftermarket exhaust. They do clean the middle of the bike up and IMO should be standard equipment, but we all know how the HD game works (what a damn shame). If you get them, follow the instructions to the letter and don't deviate. I had researched the heat deflectors a couple of years ago and avoided them after reading about the difficulty people had during installation. I finally decided to do it and they went on very easily.