My injen cai intake on my g35 whistled so loud people thought it was a turbo ... I just took the whole thing off and re-installed it and the whistle was gone. Its just a very small leak where air is sucking in and causing a whistle... start by removing and re attaching the clamps in the engine bay and carefully remove and make sure the maf sensors are sitting right. If that doesnt work, off with the bumper! and check the filters and how they are clamped on.
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09 370Z 6M PW - FBO Best 1/4 mile = 12.926 @ 109 SOLD -- 08 BMW 135i - FBO 12.1@120mph SOLD -- white 09 e92 335 Coupe Mtech - 11.9 @ 119 :-)
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