Alright maybe somebody can give me some helpful tips on the same subject. Alright in the process of trying to check if the cats were stopped up. Well while doing that I had to take the down pipe off of the headers cause the cats are right at the headers has 2 bolts for each side 2 for the left 2 for the right. Well needless to say I only succeeded on getting to nuts off out of the 4 the 2 on the drivers side came off little hard but came off. Passenger side werent to lucky I guess they havent been lubed in forever they had probably seized. Well the 2 on the passenger side snapped. I have tried puttin a pilot hole in it I went and bought a extractor kit with the bits and extractor in it and the bits will not drill into the stud. Any ideas? Every time I fix one problem I get another problem right behind it. Anybody have any ideas?