[explicitone]

I would go with the headers and the h or x pipe along with a good cat-back if your are going to spray any amount of n2o because the stock ex. system sucks and the back pressure can cause a blow head gasket/s depending on the age of the head gasket and if you plan on doing more mods(which if your on this site you have same prob we all do WE WANT MORE POWER AND MORE AND MORE) I would install the full ex. system but that is just what I think(the head gasket that came from all these mags on stock fox stangs n20 intalls and dyno / 1/4 runs