Ilmor 02 Sensor MV8V-1018 downstream & upstream play a very important role within your engine. If the 02 sensor is not working correctly, your entire engines performance can fail. Your MasterCraft boats engine will start to run rough and or start to knock, smell like unburnt fuel, and more. As we all should know, there are a lot of different factors that can cause these same symptoms so diagnosing the issue should always take place before just ordering parts. MAKE SURE YOU CHECK THE PLUG ENDS ON YOUR SENSORS COMPAIRED TO THESE AS ILMOR DID MAKE DESING CHANGES TO THE ENGINES AND THEIR HARNESSES OVER THE YEARS. PART #MV8V-1018 COMPATIBLE WITH THE FOLLOWING ENGINES MV8 5.7L-OPS - V-Drive 5000MPI (5.7L) - Direct Drive MV8 5.7L - Direct Drive 5000MPI (5.7L) - V-Drive MV8 5.7L - V-Drive MV8 6.2L-OPS - Direct Drive MV8 6.2L-OPS - V-Drive MV8 6.2L - Direct Drive MV8 6.0L-OPS - Direct Drive MV8 6.0L-OPS - V-Drive MV8 6.0L - Direct Drive 5000MPI-OPS (5.7L) - Direct Drive MV8 5.7L-OPS - Direct Drive 430 - 6.2L 6.0L MPI-S 380 - 6.0L MV8 7.4L - V-Drive 7.4L MPI-S 480-7.4L 7000MPI (7.4L) - V-Drive 7.4L MPI - V-Drive MV8 6.2L - V-Drive MV8 6.0L - V-Drive 480 MPI-S 520 MPI-S - 3in Riser 520 MPI-S - 8in Riser 520 MPI-S
