I just PM'ed Kyle at Stillen and the interesting thing he told me was that they found no difference when they tested with the bumper on and off.
Out of curiosity, we took the bumper off, saw a huge gain that repeated, then put the bumper back on and it went back to where it was before.
Technosquare's dyno has a huge fan the blows hard on the front of the car, not exactly road air flow but pretty darned close.
I was thinking one further, heat shields in back of the filters and vents in the front with a snap in cover or some sort of lovers for rain. I fabricated something like that for my Z32 Turbo but I don't have rain covers but I don't drive that car in the rain either.
The Stillen intake kills the JWT dual pop, thats for sure, if the bumper is off.
It will be interesting to see what happens when others experiment with this.
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