I've been noticing this pretty consistent sound kind of like paper flapping or cards shuffling under hard acceleration in all gears right at 3200 rpm. It's ONLY there and disappears immediately above and below. No issues at 3200 under normal acceleration. Searched a bunch of other threads that usually also mention a clatter, which I don't have, as well as sounds occuring while the clutch is engaged (mine is not). Head gasket replaced and valve adjust about 3k miles ago. Thoughts? Thanks.
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