I don't believe the 2015s come in chrome but I'm not positive. The difference between the 13s&15s is that there are slots on the bottom of the tips on the 15s. I'm assuming that accounts for the throatier sound. The cans appear to be the same size. I ended up with about an eighth of an inch gap between the pipes and the heat shields. I did get new OEM 2015 heat shields in black to match the 2015 pipes. I'm thinking the gap may be due to the placement of the holes for either the pipes or the shields on the 2013 bike but not sure. The old pipes fit perfectly, the new ones a gap but I got some header pipe high temp paint and painted the silver that was showing black. The gap remains but is much less noticeable with the black underneath. Hope that helps.