Check out stuffforyourranger.com as they have plenty of ranger stuff. I think if you are on a budget, look into an underdrive crankshaft pulley. I noticed a difference in acceleration whether it be in town driving or high rpm take offs. Also, I managed to pull in an extra 15 miles to the tank between fill ups, which isn't too terrible now is it. If you are feeling a bit more spendy, then look into an Xcal and tune for your truck. Especially if it is an auto trans, as the tune will tweak both engine and Tranny. If its a manual, look into the Xcal and tune still but also check out rogue 1.7:1 roller rockers as these will extend the life of your engines oil, provide a good solid horsepower increase, a quieter valvetrain, and possibly slightly cooler engine oil temps. A cat-back exhaust will not give you very much of an increase in power but it will give you the healthy sound and good looks to go along with the other mods.