ARacer RC Super 2 Stage 3 Ultimate Engine Management System ECU will completely replace the OEM ECU on the KTM DUKE/RC 390 2017+! This is not a piggyback ECU, the RC2 completely removes the OEM ECU! This will eliminate all of the issues that would occur with the OEM ECU, giving you full control of how the engine will run without any worries of random changes that typically occurs with a piggyback ECU. Adjustments could be made with a laptop. The RC2 is 100% plug and play, no wiring needed!