MaxxECU has developed pre-terminated engine harnesses to suit specific engine applications, designed for mostly engine-swaps. Quick and easy harnesses mounted in a few hours. Comes completely with OEM connectors, and are designed to be the fastest and most cost effective way to wire your MaxxECU engine management to your race car or other engine conversion vehicle. Is there a particular model you request? We will developterminated harnesses for specific engines, provided that the interest is high enough and it is technically possible, please contact us to make an inquiry


  • Toyota 2JZ
    Toyota Supra 2JZ

    (with or without VVTi, for VAG 1.8T coil-on-plugs)

    More information




  • GM LSx
    GM LSx

    Fits GM LS3 and LS7

    Coming soon, in 2018