Just bought a hydromotive prop and am currently running mirage on a bravo 1 drive. Do I need any special thrust washer or hardware to swap these out? Thanks

All the hardware from the Mirage will work.

It actually depends on the vintage of each propeller.
In most cases over the last few years the attaching hardware is interchangeable as Hydromotive moved to the square bore FloTorq 2 hub assembly.
If one is a pressed in hub and one is square bore, you will need different stuff.

Brett