since your car is a 92 , id say you check the bolts on the cat converter and see if they are rotted to the point where you'll need to drill them out, trust me, you dont want to drill out the bolts from the cat(i say this because i have a 94 with less than 80k and i had to drill the damn things out of the cat because i broke the bolt heads). if the bolts are rotted like that then it would be smart to take your car to a shop and have them put the exhaust system on.