Exhaust rattle

[Al-Haqq]

So I recently put new exhaust on my 83 squarebody. Headers back to the bowtie tips. I put 3" everything, including the Cherry bomb glasspacks. After a couple of weeks I started to hear a rattle coming from the exhaust. Checked everything and found out its coming from the glasspacks. Is there any way to stop this?? Without replacing them, or is that the only way??

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[bd]

Probably the perforated pipe has broken loose.  If they are brand new, seek warranty replacement.  Otherwise, install new ones.