Hi Dan,
I had a custom radiator built and I have the hose connection on that end of the radiator in a different position than on the factory radiators. The reason is because I felt it was a little too "busy" in the area where the original routing was designed by Kitfox, particularly in proximity to the exhaust pipe. So, I used a combination of silicone hose along with that small section of aluminum pipe (which I put a small bend in) to get clean routing without contact with surrounding structure, etc. The 1" silicone hose wants to remain straight, and I wanted a little bend there. You can also see the relocated connection on the radiator in this picture (on the back of the radiator). It also shows where I re-mounted the air/oil separator (slightly different than in the original position), to allow the hose to go "downhill" all the way from the oil tank a little better.
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