Maximum Performance Mercruiser Throttle Position SensorFits: 4.3L MPI, 5.0L MPI, MX6.2 MPI with ECM 555 and 350 Mag MPI, Black Scorpion Ski, 377 Scorpion Ski, 7.4L MPI (L29) & 496 Mag & HO and 8.1S & HOReplaces: