I have a 99 Sierra with a 5.3 in it.

From what I've read the Injectors are 21.7lb..in other places I'm reading 24lb or 26lb..does anyone have a correct spec?

Also, what PSI is that rating..I replaced the Fuel Pump & Sending Unit so I'm goin to check the pressure on it.

I'm asking cause I'm swapping the Cam.

 

They are 21lbs Find yourself some 8.1 Injectors I just sold mine but I think there is another set in the classifieds for sale.

 

What are they rated for? Are they a direct bolt in?