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Hi there. I have a 2014 Mini Cooper 1.5L Twin Turbo. I just bought a K&N cone air filter for not only better performance but for the amazing turbo flutter. When I fit the air filter it makes this flutter but when i then turn my car off and turn it back and go for a drive I can hardly hear it/ and or at all. What could be the cause of this? a leak? not on tight enough? please someone help. thank you
 
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