Question On Injectors

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Junior Member
I have a 99 SI and im looking at getting RC 550cc injectors. I have a AEM fuel rail now. I was wondering if i need to get anything else with the injectors or can i just unplug the old ones and plug in the new ones.
well i dont know if i need 550s i was just wondering. i have a vortech SC w/aftercooler and i wanted to upgrade the injectors.