Not everyone wants to spend $500+ on a set of injectors- all you need to do is swap the nozzles yourself. Some people don't realize that the only difference between the stock and performance injectors is the higher flow nozzles. Swapping them is easier than even pulling the injectors (though you still have to pull them to swap the nozzles)
IF you want a simple inexpensive upgrade, see my sig, or the ad in the classifieds group buy section.