Exhaust Problem
 

I started my b5 a4 and heard a terrible mumbling whine. It sounded like a hole in the muffler so I went underneath to find it and I found this instead,

http://pictures.sprintpcs.com/mmps/0...itsize=615,500

and close up
http://pictures.sprintpcs.com/mmps/0...itsize=615,500

can I just weld this or do I need a new exhaust?