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Discussion Starter · #1 ·
After a week with my Dynomax Catback I started to notice a vibration and a really annoying frequency coming from it , sounds like a tractor trailer is parked next to me. What might be the issue?
 

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Discussion Starter · #2 ·
This is mostly when I first start the car and is in idle, after I drive it away is less noticeable but still there.
 
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