[Mitch Leland]

I had a custom aluminium radiator made, it attach to the factory mounting locations, but is slightly wider, thicker with more tubes. I bought it from Wizard cooling, they have drawings. I think one advantage is that I had them instsall 1" in and out tubes. I had them install the tubes so the hot water circulation entered the top fitting, the cooled water left the radiator on the bottom fitting.

The Tiptronic radiator has 7/8" hose fittings and both fittings are on top. I had "Y" fittings made for the connection to the stock radiators, however I ended up with one new "Y" fitting so the water flow out of the 3rd radiator was flowing with the factory flow of water, not against it. My water flows forward on the right side and the cooled water returns to the engine on the left side on my wide body "S". That's important to know how your water travels through you radiators.