What is your input on my exhaust leak?
Get it fixed yesterday. Exhaust leaks are very annoying & cause an engine to sound awful. If you've got a leaking gasket, then get a new Toyota gasket (what, $5-$10?). Check to see if the manifold is warped before you bolt it back down. A trick you can do is apply old, used grease to the new (or used) exhaust gasket. When the gasket warms up the grease will cook and bake the gasket to the manifold & cylinder head.
You may also have a cracked exhaust manifold, leaking EGR pipe, or a leak where the manifold connects to the down-pipe before the cat. There are two doughnut washers at this down-pipe and I strongly suggest you use Toyota gaskets here for a proper fit that will last much longer than aftermarket "universal" gaskets.
Finding the exhaust leak should be basic in most cases. With the engine idling, listen to where you think the leak is coming from and carefully move your hand around said area. Of course don't touch any thing, just use your senses to feel for warm air blowing at your skin. You could also use a sheet of notebook paper and watch as the paper is pushed away at the source of the exhaust leak.
Good luck and get that thing fixed! The 22R is a great engine when properly cared for!
BigMike