No one is really sure. I know the stock protege injectors are around 270cc but I'm not sure if they upgraded the injectors or not with the MSP I doubt it since everythign else about the motor is the same. SO I'm guessing same as the regular Proteges 270cc.
I thought i heard some where 310cc or 330cc.Not sure but they are different then stock 270cc FS injectors.Pretty sure they are up in the 300s some where.