[newb question]Yesterday went and pulled out the K&N filter (in original air box) on my 96. As would be expected from my P/O, it was well beyond the "need to clean" point. Washed it down, let it dry (overnight), oiled it back up. Late this afternoon I took the truck out and was buzzing around town and I hear intake whistling from the intake side of the cab. This is a new sound to me in this truck... Is it usual to have this whistle from the stock box? I don't see any cracks in the box, the lid is seated properly and all the clamps are in place...
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