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I haven't been running a wedge since I traded my first one to Pro Stock John, it was also at the same time I installed what's basically a Halltech Yellowjacket intake and have been running no wedge.
I decided that I wanted to make a rubber/cork gasket to install with this wedge, and I installed it flipped 180 today with the same intake... At this time I think personally notice no difference with the flipped wedge and the HYJ intake. I will run it the rest of the day, and flip it the right way tomorrow and compare.
My reasoning for the cork gasket was thinking maybe it was getting squashed too much inside the throttle body/wedge hole and could possibly obstruct the air flow path. Not sure if it's the new cork gasket, or because it's flipped upside down right now, but I now have no whistling or additional sound what so ever with the wedge installed. We'll see if the sound comes back tomorrow when I flip the wedge back over.
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