This 84-865454A02 wire harness is designed for use with the Mercruiser , MPI 350 MAG Bravo Sterndrive. It provides the necessary electrical connections for the motor and components. The harness is made by Mercruiser and is suitable for use in boats. It is not a custom bundle and does not come with a warranty. The manufacturer part number is 865454A02. There are multiple sensors, relays, and solenoids attached to the unit.  ECM does not come with the harness.