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Squeal high pitch whine under load

1991 Views 4 Replies 3 Participants Last post by  D1JL
Just installed Cobb ap 91 octane. I've noticed often under heavy load when letting off gas to switch in and out of 3rd maybe 2nd gears I get a slight high pitch audible squeal. Anyone know what this could be? Is this normal?
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Did you install their panel filter?

It might be some turbo whistle you couldn't hear through the old filter.
Well there you go.

I hear the turbo more since installing a K&N without a tune.

Its spinning around 200,000 rpm, let it whine.
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