[Batman]

I agree with the lid definately, IMO longtubes cost you too much low end grunt then they are worth with stock internals. For the price of a set of longtubes you can do a cam upgrade. But to keep it simple and cheap a lid, cold air kit, a good cat back, and Subframe connectors (not a performance gain but a big help in structural rigidity). But ideally we need to know what you want to do with it to give you a better idea.