Yes, if it's factory it's fuel injected. As for parts start with intake and exhaust. Cold air intake, headers, exhaust system even intake manifold. Fuel injected intakes are not cheap though, unless you get a deal on used, or go to the junkyard and pull the top end off like a 98 explorer with a 5.0 with the gt40 intake manifold and heads, they also have the GT40P heads, the GT40P heads will higher the compression a tad and flow better then the GT40, but you need certain headers for the GT40P heads, but if your gonna buy new headers anyway might as well get them for the heads that flow better. Just all depends on how much your looking to do.