I was putting the new injectors into my fuel rail last night and noticed something about the injectors. The # stamped on the top of 2 of the injectors was different than the rest of them. 2 of them had the # 48260 stamped on it. 4 of them were stamped 4907N. Other than that, they were the same. The part #'s on the boxes were all the same. They all looked the same. Is this something I should be concerned about? Here's a picture.

 

Probably just nothing but I would ask the vendor where you purchased them or send an email to Nismo.

 

break out the multimeter
do they all register the same on it?

 

They all tested at 11.4 ohms.