If your Roadster came with standard exhaust then the cats are located inside each muffler. If the bike came with TORS exhaust then there is no cats at all. Looking at the end of the muffler where the exhaust comes out .... standard mufflers have a 1.25" outlet while the TORS mufflers have a 2" outlet. This isn't exact measurements but gives something to go by on what to look for. Another way is that the standard mufflers with cats will get extremely hot while the TORS will not. If the mufflers seem to be very hot after shut down then those are standard mufflers.