just be careful on your exhaust choices. if you buy some exhaust that comes with a bunch of random piping that your going to have to piece together then you run the risk of having a whole lot of jagged curves in your piping, but if you go for some good exhaust then it should come bent to pretty much exactly what will fit under your car. it will also have plenty of hangers and good placement of them. if you have a good welder then you can make a lot of stuff work but its just a lot easier with some of the prep work already done.

AND make sure that if your car is OBD2 that there is a bung for your second o2 sensor because thats a pain in the ass.