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Message: <blockquote data-quote="5PntOhh" data-source="post: 564673" data-attributes="member: 11056">The other day I installed a 65mm t/b on my '95 5.0After I was finished, I obviously took it for a cruise and made sure everything was functioning properly, and it is. No rough idling or hesitation all the gauges are readings fine.But! as I was cruising I got on it a little in second gear and around maybe...1800 to about 2200 RPM I heard a whistling, and it does that (same RPM range give or take a small amount) in just about every gear except 1st. And when it does this whistling, nothing changes, car runs great.Is it just the added amount of air traveling and I can just hear it now?Or is it something I should be more concerened about?Obviously after I heard it I checked under the hood, made sure nothing had become looose and that everything was connected; which it was.</blockquote>