What cheap reliable intercom

[patmahe]

Myself and my wife do track days together, we both have full face helmets, the car is loud and open topped so communication can be a problem, just wondering if there is a good cheap reliable option for some sort of intercom setup that can be used comfortably and safely inside a helmet? What if anything do you guys use?

[Evoluzione]

If only there was a search facility you could use.

https://www.pistonheads.com/gassing/topic.asp?h=0&...