I hope you don't mind rippedforce85 but this should help complete your kit for those on the fence. Let me know if you want this post removed.
I have a set of used 600cc injectors and Walbro 255lph fuel pump that came with the Stillen Kit. I don't need them because I am upsizing the injectors and pump. For sale thread is here:
600cc Injectors Denso Used
Got a quote from Deutchwerks of about $60 or $80 to flow test the injectors and replace the O-rings. This is highly recommended when you purchase used injectors for piece of mind.
Price for the injectors and pump lowered to $400 to cover cost of injector flow test/cleaning.