First thing to do is to line the used exhaust up gainst your old one when under the car, paying particular attention to the length of the exhaust and the diameter of the flanges, especially the front one. When you are happy with the exhaust and its the correct one, there are 3 types of standard, the hardest job will probably be getting the bolts off as they normally seize on. You`ll need wd40, sockets , wrenches and most of all brut force and patience. Preferably have some new bolts standing by, M10X40 with new nuts and washers, and some new replacement gaskets if you can get hold of them over here. Good luck.....