I need to repack my exhaust can, but I can't seem to get it appart.  I've removed the 8 bolts (4 on each end of the can) and I've tried to remove the end cap and the whole can, but it won't budge.  I've even given it a few light raps with a rubber mallet to loosen it up and nothing.   Any suggestions?  What am I missing here?  Thanks.

Rich