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Old 04-20-2021, 03:48 AM   #15
tlc356
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Join Date: Jan 2011
Location: dedham ,ma
Posts: 72
Mystery solved

Air filter checked out A-OK so I reinstalled the plastic cover with care.
A high rpm highway test proves that the strange roar with a flapping sound is gone.
I believe the air filter cover was not securely attached at the bottom (two screws attach at the top-2005 S). If all my issues were so easily found and fixed............
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