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I have a bavauto cai and B&B triflow exhaust, recently i have been hearing this choking like noise fron the intake, has anyone else heard this on their car? its only when i rev it and let go of the gas, when the rpm's are falling. is this bad? im guessing any foreign noise is not good.
 

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I get the same thing with Dinan CAI + UUC TSE2. I don't think it's a problem, but I don't have a technical explanation either.
 
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