ORIGINAL: TimC
Try running the engine with the through bolt removed. The rear half of the muffler should be blown off.
Nope - Didn't work...
Even with a wrench, it won't budge. (I'm afraid to bend the aluminum, so I'm not twisting with all my muscle, but enough to tell it's on there really good.) Is there some sort of aluminum-safe solvent I could soak it in?