Simple mechanical question

I posted this elsewhere, but why put all my eggs in one basket, right? I have been trying to replace the front exhaust pipe in my '94 camry, but I can't manage to get the bolts to loosen! I have emptied an entire can of "liquid wrench" on the three bolts under the exhaust manifold, but they won't budge. They don't appear especially corroded or damaged. Anybody have any tips or tricks (besides go to the gym!) so I can get some work done here? Thanks.

Either get a bigger wrench, and plan on replacing some bolts when you're done, or... you could try a dremel.

exhaust bolts are notoriously hard to remove, 9 times out of ten, you will either strip the bolt, the hole, or both.
have a tap handy.
also, get a long wrench to help loosen the bolts, but take it easy.

Heat them up and they will probably loosen up.

torch them and get a breaker bar