Can anyone explain what the differences are between all the different injector codes? I'm going to be replacing mine soon along with the IP and my turbo that has been in a box on the self for the last three years. What codes should I get? It seems like "G" or "BB" is the most commonly used ones but what's the difference between them?

 

"Pop" pressures (the psi at which they open and inject fuel) and nozzle tips. That's about it. The BB's are the preferred sets, because they're the easiest to find and have the highest pop pressure. The differences in nozzle tips are minuscule.

 

stanadyne factory 93-94 turbo G codes installed. results: