[bumper-soot]

maybe try and heat it up real hot with a torch. im goin to be taking my muffler out soon and i figured if i couldnt get it off the way you described that i would try the good 'ol torch, heat it up red hot and try to pull it off that way.

 

[Meierznutz]

Break out the HOT HAMMER and go to it. Once its cherry all the way around... tap, pull, kick and it will slide right off. Good Luck... Chris

 

[smokin_dodge]

i actually cut my muffler and cat off. just got up underneath (an advantage of being small) and used a reciprocating saw. when i got mine off my pipes were rusted together (we tried an air chisel and no luck) so you might be in for more than you bargained for with dissasembly. then i went to my local muffler shop and got a piece of 4" pipe, had it flanged and welded it up. my total cost ended up to be about $45 for both pipes

to weld up we just got a 185 miller and set it slow wire medium heat and tacked it, we couldnt run an actual bead because my pipe would melt away from the rust.