Does anyone know wha type of injectors are in the different versions of the impreza eg. WRX, STI, RA etc...

 

My my97wrx has the yellow injectors which are 440's, earlier WRX's had grey injectors which were 380's. My car needs 550's to get the next level of tuning, as the 440's are maxed out with the 306 - 314 bhp dependant on ambient temperature.