For easy installation and replacement of old 57mm 25 kHz Radios we offer a range of adapters that connect into your existing Radio wiring loom so you donít have to re wire everything. Alternately, if your old radio does not have an adapter listed, there is a simple wiring loom option as well. Donít forget that Radio installations need to be signed off by your inspector and the logbook of the aircraft updated. You will also need to inform the Radio License people of the change of Radio. Navboys can arrange fitting and the paperwork for you. We can also advise on the best way to re sell your old radio to reduce the total cost.