Hi

I changed my catalytic converter and some exhaust pipes recently.

Since re-assembling everything I am getting a loud "banging" around where the muffler meets the muffler straps.

If I loosen the two straps it goes away, but then my bolts eventually fall off.

What is causing this noise?  Is the muffler maybe too far forward or backwards in it resting place?

All help much appreciated.

Best regards,
Shawn.