I don't believe that they will mount directly up, but I would bet that you can find a conversion kit (check with Fab Kevin). At the very least you may have to shim to get the caliper to sit correctly over the rotor.
So ... what's wrong with the stock Kelsey Hayes brakes anyways ??? At least they use DOT 5 brake fluid. All Brembos use paint eating DOT 4 fluid. That was a stupid move by the MoCo IMO ...
Kelsey Hayes MFG. Is about a mile from the Milwaukee H-D headquarters. Like dang, right down the street from the MoCo !
In my case, stock brakes are only 1 piston. 4 piston Kelsey Hayes would be fine for me and a good upgrade. I ask about Brembo's because that's what CVO 's are coming with . I would guess they are better than stock, HD would never rip-off its customers.