I have here a used set of 6 440 injectors off of my tracked 2004 Nissan 350z  had 72k miles on it and it had aftermarket fuel rails and stuff all put back to stock these injectors had no problems car ran fine but put the car back to stock.... I don't think the injectors have more then 15 k miles on them since I bought the car to my knowledge. E85 compatible  I have six of them and one of them is missing a gasket.

Doesn't fit stock fuel rail to my knowledge but then again stock injectors fit on the aftermarket rail so not sure. I know the plug harness is different