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Discussion Starter #1
When my 09 fx50 is warmed up and engine running, I hear a rattling noise coming from under the car, near the Y pipe. Don't hear it when car is cold, only after warmed up and been driven for at least 15 mins. Sounds like metal shavings rattling inside the pipes. Is louder when car is in park than drive, but still very audible in any gear.

Been under the car, thought maybe a loose heat shield. But tried banging and shaking all exhaust pipes and fittings, nothing appears loose. Also, would think if it's something loose, it would make the sound when cold or hot. Anyone else have this problem?
 
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