I am fully aware that the stock sound system and HK sound system have completely different wiring harnesses so I would likely have to do a lot of my own routing of new cables. It seems like a feasible project but for some reason, the only resources I can find are related to the R56 HiFi setup to HK setup. AFAIK there are cars configured with HK Audio along with the stock Boost CD but those have Bluetooth/USB which my head unit does not have (the two have different P/Ns). So the question is whether or not my head unit can even provide a line out and CAN bus connection for what I assume is to tell the amp the EQ and fader controls. Also, would there be lots of coding involved or would it just be plug and play? Thanks for the help.