Going to do the injector swap with injectors from Precision Injectors. I want to have o rings on hand in the event that I damage one while installing them. Does anyone know the size/part # I should get?

 

Parts store should have em on hand. Take a old one with ya to match em up. Imo new ones should be used. Old ones can be hard, scratched,or brittle. Don't forget to lube em up before re-insertion.

 

Pretty much any auto parts place will have the o-rings...O-rings are basically o-rings now-a-days and probably 80% of vehicles on the road use the same ones but the guys at these places usually are just button pushers so to keep it simple tell them your specific vehicle/year etc

 

Felpro part # ES70599