I have a Superchips Tuner for my 04 3.0L. It came with the truck, I bought it from my coworker and he gave me the tuner with it. I actually leave the stock tune on, it seems to make no difference at all. The only reason I keep it around is for the OBD-II code reader feature. If you get a tuner, Id say get an X2 from one of the two people. Both are very good from what I hear. If I was to buy another one, I would go with one of them. The X2 is the tuner itself, its mfg by SCT. These two sites sell the same tuner, the tunes them selfs are just made by two different people. Like I said though, both are very good from what I hear.
2008 Ranger FX4 - Vista Blue, Extended cab 4-door, 4.0L, auto.
2004 Ranger Edge, Sonic Blue, Regular cab, 3.0L, 5 speed. Many mods.