Sorry it’s not posable to Adapt Stilo trophy intercom Rally amplifier to Stilo WRC helmet electronics. The design WRC electronics, the standard Trophy amplifier intercom is not compatible. Please note: Not compatible with Trophy Rally helmets to WRC Intercom this is not posable, or other way around there is no Adapter available.
You need to retro fit a WRC or Rally Trophy helmet to match the systems, WRC only works with WRC, trophy will work with Trophy.
Some Teraphone, Graytronics will work with some Stilo products
Note Trophy plus helmets will work with WRC but not Trophy intercoms.