theres no power fc for evo 4 BUT u can use the power fc from evo 5 or 6 on evo 4with minor mod on 1 wiring,if not mistaken the charging from alternator or something similiar to that,wireman can kaotim it easily
Since there has been some sharing on other non jap ecu tunnings, perhaps if there is anybody interested in getting their jap aftermarket ecu tuned, you might be interested in this.