Should be a 15RC. You can confirm by looking, will be printed on it somewhere.
I went through a lot if trial and error with my '09 Calvin. The BEST combo was open airbox, GuzziTech H-pipe and STOCK mufflers. ECU reflash to eliminate O2 sensor and closed loop fueling. I had Mistrals on the bike, but they were too free flow in combo with the airbox and crossover. I never could eliminate the popping on decelleration. You'll need to plug the crossover bung after pulling the O2 sensor. If you go that route, PM me and I'll send you a link for the plug.
Bottom line, map was richer and similar to aV11 Sport. Bike ran like a raped spotted Himyalian snow ape.