Exactly, if you dont fix it now, the crack will most likely spread, creating an even louder and smellier situation.

You can find exhaust manifold walkthroughs on the internet, also by searching the forums. It really is as easy as I described. If Helms doesnt have any available, you can check your local Pep Boys for the $15 Haynes manual. It isnt as thorough, but for your purposes it should be fine.