I put the FMF Q4 silencer on both our 2015 690's and am very happy. The FMF web site does not show a 2014 or 2015 fit; just order the 2013 FMF model and the 2013 KTM muffler hanger with rubber bumpers and it bolted right up to my 2015. If interested I'll go into more detail - PM me.
I also bought the FMF because when the packing needs to be replaced, the FMF comes apart with allen bolts, you have to drill out the Wings rivots and then order special replacements to put the can back together. Just sounded like a real pain.
Good luck abusing your credit cards with the new bike!