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I've tried a few configs and this is what I ended up with after a few track weekends of testing, no matter what I did I could not get a duct to reach the rear of the hub without cutting the flow to almost pointless levels
I used to run the same setup but after testing with an airspeed meeter I found I really was not getting enough air to do much. I bench tested after removing it and found that the length and turns drastically cut the flow I had hub adapters too
I know it's not the best set up but it was cheap and didn't involve hacking up the bumper skin. I shot some low pressure air through the fog light holes and felt plenty come out. Better than nothing I suppose.