The Wing exhaust is in basically three sections. A header pipe, a center collector chamber, and then the mufflers. It would be best to think of it as a 6-into-1-into-2 exhaust. The center collector chamber bolts to the frame in addition to being slipped onto the header pipes. The mufflers then slip on to the center collector chamber, and bolt to the saddlebag mounting frame. I'd like to be able to put the stock Valkyrie exhaust on to my Wing, but I don't think either of us would have success due to the differences in the frames.
Yup you're right, I looked at the parts diagram since my original post. Until I got this wing I never knew Borla made any bike exhaust.