We've tested it and other are using it in the 9C. I don't have a 9Z to test it with but if they use a similar module then it should work.

Note: In the past many people used the Hitec Spectra synthesized module in Futaba radios, and while it worked, the combo was not FCC type accepted so technically it was illegal. Hitec Spectra 2.4 system is self contained and does not use any of the radios RF section so it is legal to use in any radio that it fits.

Mike.