• Module/harness kit is used to convert a Ram Jet 502 from MEFI 3 to the newer MEFI 4 design, which offers improved idle and performance through a closed-loop system
  • Includes module P/N 88962718, wire harness P/N 88961968, oxygen sensor P/N  19178918, intake air temp sensor P/N 25036751 and oxygen sensor fitting P/N 15156588

NOTE: The ECU is programmed with a “green mode” that controls the rpm for the break-in period. During this period, engine speed is limited to 4,000 rpm in the first hour, 4,500 rpm in the second hour and 5,500 rpm in the third hour.