AEM 30-3829 Plug and Play Adapter Harness - Infinity Series 3 to MEFI 4

Plug N' Play MEFI-4 Adapter Harness for Infinity Series 3 Engine Control Unit

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AEM's Marine-grade Plug n Play Adapter Harness for MEFI-4 equipped race vehicles (PN 30-3829) allows users to switch from the older MEFI-4 platform to state-of-the-art standalone engine control with built in racing features like boost, nitrous, traction and launch control, in about an hour. This adapter harness includes MEFI J1 and J2 connectors to attach it to the MEFI harness, a 73 pin Molex connector to attach to an Infinity Series 3 ECU, two Lambda connectors for adding external wideband controllers and sensors, a connector for HEI-distributed engines or the option to run 8 individual AEM smart coils, an AEMnet CAN bus connection for connecting AEMnet enabled devices, an integrated relay and 12-pin DTM style connector for fast and easy integration of auxiliary sensors and switches.


  • For use with Infinity Series 3 TO MEFI 4
  • For use with AEM Infinity 708/710/712
  • Premade harness with all correct connectors
  • Allows users to switch from older MEFI-4 platform to state-of-the-art standalone engine control
Brand AEM
Product TypeECU Harnesses
Manufacturer Part Number30-3829
Part Number30-3829

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