I have a BMW system 5 helmet, which has the relevant AS approval. The new BMW Sysyem 6 helmets do not have this approval (as far as I know) but have a good comms sytem that can be added. I don't think that the new System 6 comms sytem can be fitted to the System 5 helmet. On looking at various options re comms for the system 5 helmet, I see that the Schuberth C3 has a collar that has a comms system in it. Review here: http://www.webbikeworld.com/r4/schuberth-src/ The Scuberth does not have Oz compliance either. The collar that fits the Scuberth looks suspiciously like the collar on the system 5 helmet and might just fit. Has anyone tried it or does anyone have more info about it? I currently have an Interphone F5 which is ok but not brilliant. Many riders have been buying the System 6 or Schuberth C3 from overseas anyway but that approach causes some concern because technically you are riding without a helmet if the one you have on your head is non compliant. I don't know whether this would lead to a) a fine for not wearing a helmet or b) some problem with insurance should there be an injury whilst weaing a non approved helmet.