any apb ecu will cross flash and if you use a/m box it also immo offs the ecu because they where not equipped with immo. so no eeprom flashing required. tho the 2.8 ecu will cross flash i dont reccommend doing so the ecu is missing hardware that the s4 ecu has ive tried this in the past and had no boost control. others may have had better luck why? idk but i dont recommend it
Hello!
What kind of problems do you have with boost control?