Ok i just removed my fuel rail and injectors and this is what i found. 2 of the injectors were missing the screens at the top and 2 of the injectors o rings were busted. Its sunday and the dealer is not open to get the parts. Should i get new screens for all the injectors or should i just take the others out? How much would the o rings cost for the injectors?

What would be affected if o rings were messed up? (the ones between the injectors and the manifold) Would fuel pressure change or anything.