waterboxer radiator location.

[Joel]

Why do people always try and reinvent the wheel?

All the ducting in the world is not going to make a rad in the parcel tray area work properly, the only way is something like Wallys.

Front is still the best option though, look at all factory setups that are rear or mid mount (Porsche, MR2, MGF just to name a few), they still use rads in the front, cos it gets the best air flow and the heat can get away as well.