The 4AGE have a Nippon Denson ECU i think and I heard that you should really change the ECU as it is a big restriction. Is it even worth putting a Greddy E-manage on or is it better to just replace the ecu complely?
Nippon Denso = Toyota
If you want to change your injectors or tune your timing and fueling you will need to buy an ECU or a piggyback ECU like the emanage.