Muffler off, need help!

[petop]

Garage had my muffler off and opened it up but looking inside they are unsure what is broken. Thinking it would be plates/baffles loose. Me not having seen inside before can't really advise them but apparently it looks like boxes within boxes. Does anyone know what breaks inside and where they should bs looking?
Cheers in advance

[MrC986]

If I am right, the exhaust makers don't admit what witch craft they do to the 'innards'. If you don't get lucky, you can always send it to Carnewal who will fix it (they seem to have a good rep. on here) and even upgrade the insides for a bit more 'roar' or alternatively take the box to someone like Hayward & Scott - it sounds like someone might have thought the 'baffles' were rattling perhaps and that they might be able to fix it or are the shields on the cats are rattling?? Good luck getting it fixed

[petop]

Heatshields etc are fine. OPC Guildford said it was the baffles so happy with the diagnosis. Ive actually found some good 911UK Forum and Rennlist links to Baffle Repair so sent them off to Garage.
Hopefully they can sort it.