Originally Posted by Fairydust
Granted a pure copper block is preferable also in my eyes, but as far as mixing goes that Innovatek block is not that catastrophic.
The aluminum is anodized, copper is crome or nickel plated and the anode smaller than the kathode. So unless you scratch it on the internal side, which will render the whole annodized layer useless, it not that much of a problem, certainly not with inhibitor additives.
Now I am not saying it is any good, the only reason why I would choose such a combination was for price or weight reasons, and at 108 € its ridiculously pricey compared to a full copper EK block for the G80.
Enjoy: Stainless steel can cause bimetall corrosion with copper too.