Ah Ha! That's where I thought you were coming from.
That's just an oversight on Yoshimura's part.
Another thing their site doesn't tell you is the slip-on they list for the 2001+ B12 fits the earlier B12. This is the same setup that fits all B6's. The can they list for the 1G B12 is a bolt-on and it only works on the 1G B12 because the B6 can't use a bolt-on can and the early 2G B12's with bolt-on cans have the clocking of the mount holes different from the 1G.