i just got back my fuel injectors from being cleaned and tested, when I sented it I labeled which ones were secondary and primary, but when I got them back they didn't label them, they just put them in individual baggies with numbers 1-4 on them. any way to tell which r secondary and primary or theres no difference as to which rail i install them in?

87 n/a thanx

 

Unless you replaced the stock injectors with larger ones at some point, they're all 460cc. It doesn't matter which one goes where.

 

ok thanks, yes they're stock, im gonna install them tonite thanx again