Is K6 compatible with the AGV ARK intercom system?

Yes. K6 is compatible with the AGV ARK Bluetooth communication system.
A specific adapter is available, designed to integrate perfectly with the design of the helmet and ensure excellent aerodynamic performance even when the intercom is mounted. 

As well as the device, you will also need to buy the specific support, designed to trace the shape of the helmet so that it does not impact on the helmet's aerodynamics.