the reason it whistles is because the little hole that is drilled in the throttle plate in there is drilled at an angle. So its kinda like you blowing sideways on a beer bottle opening.
Its not a problem unless you get too annoyed with it.
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NMRA O/C 9516
NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft
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