The official line is that the only people who can recondition these injectors are the original manufacturer as nobody has produced the kit to re code the injectors , all these injectors are the ones they put on a rig put in the original code into a drone ECU and run them , if they inject correctly as far as they can see they clean them and sell them on as "reconditioned" , but the truth is they are just "checked" and "painted" to make them look good .

If I was you I would much rather spend the 280 on 1 injector and know it was right than a set that could be worse than the set you have in already , we always only replaced the faulty one , never a set , especially under warranty as ford would only pay for "proven" failures , that was a print out or later on a "RVC - Repair Validation Code"

Hope that helps