Thanks for the update on the model year, I appreciate it. When I bought it, it was advertised as fitting a 2014-2016, There's another one just like it listed on eBay right now as a 14-16. I'm new to the RR's, and appreciate the update from those more informed than I.
Try USPS, it might take 2 months but it will get there. Yes, 2010 to 2014 all had the shorty muffler, and 2014 to 2016 S1000R also had the shorty. 2015 was the first year of the muffler you have, then in 2017 the RR switched to a two outlet cat to meet Euro 4 emissions. Things went downhill from there.