Exclusively for Lancer Evolution IX. ECU is brand new and it was never installed. Some words from Ralliart INC about this ECU: The E.C.U., vital to the engine management, was tuned with RALLIART's long experience in the field. In order to enhance the
engine performance, A/F(Air/Fuel) control map, ignition timing map and waste gate control etc. were modified. The best conditions ...