I'll be doing my first plenum pull soon to replace a bad injector (#5) so I'll of course be doing all of them at once. I have an upgraded ECU which allows larger boost, aftermarket intercooler (front mounted) and other small mods done. I have heard the Nismo 555's are great so I may buy the kit. I am aware I need to reprogram the ECU to accommodate for the larger injectors. My only question or concern is if these are too big of injectors given my mods (stock turbos) or if I should just stick with 370cc stock injectors. Thanks and I did a search with no clear answer to my question :0