MEFI J2 Connector Kit the pin housinghs are larger

the pin housinghs are larger on some of the pins of the CAT connector than on the standard J1939 connector

MEFI 5 is the newest generation of MEFI engine controller in widespread use

This cable works on cars that have the serial data pin on pin M or pin E of the GM 12 pin OBD1 ALDL connector

Use modified engine calibrations at your own risk

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MEFI J2 Connector Kit the pin housinghs are largerMEFI 1 through 4B ECMs have two high density 32 pin connectors, J1 and J2. The keying on the two connectors are different, preventing the connectors from being plugged in to the incorrect connector. The alignment keys are a plastic piece on the nose of the connector, the J1 connector (this one) is a smoky color, the J2 connector is clear. Each connector assembly contains several parts. A backshell that holds the assembly A green weathertight seal A