heres my little tip: just be careful when removing it, its ont he exhaust(i thinkthats where yours are, i did this on OBDI) and those bolts are tough, spray some PB on it, and take a breaker bar, and DONT strip the bolts, if you do strip the bolts, heres a little trick i learned that always works:
head up the bolt till its red hot,then dump cold water on it, should come out w/ a vice grip