Ahhh man, this is so confusing. I had a I had a Cobra It2000 Black tuner on my 2013 Road King CVO, Screaming Eagle 110. I got Amazon and the seller to take it back after using it for a few hundred miles after I realized it was fuel management only. I purchased the TTS Mastertune. Man, finding instructions, that are recent, on just where to start are really hard to find. The only things I've done to the bike are to put on a K&N air cleaner and put on some Cobra Powerflo's. They have like 3" baffles in them and sound better and better all the time. I plan on going with the Fullsac Sport Pipe header in the not too distant future but for now I'm pretty confused on which cam I have in the bike, 255 or 260 and how can I tell. Do I have to go all through the Computer in the saddlebag thing or can I just load a setting into the tuner ? When they refer to having " race exhaust" would the Cobra Powerflo's be considered " race exhaust" and is just having the slip on's considered " race exhaust" or does that mean I have the race header too? I grew up in a garage working with my dad and was a Huey mechanic in Nam and the Army so I've got some mechanical aptitude but this stuff is really confusing and there isn't much help online. Any help you can give me is greatly appreciated.. Thanks so much.