A while ago I read a detailed how-to post on cat converter replacement. I searched for "cat converter" and "catalytic converter" but was unable to locate the thread. If anyone remembers the post/thread, please help me out. I need to know what's involved in cat replacement. I just read a sticky that says difficulty of the job is 4 out of 5. I am willing to tackle it, for I can keep it in the garage for weeks. Thanks.