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    LMMF SIMPLIFIED WIRING

    • Home
    • All products
    • 3100/3400 Engine
    • 3800 Engine
    • LS
    • ECOTEC Engine
    • 2.2 GM
    • TRAILBLAZER
    • Toyota
    • Apparel
    • Contact
      • Return Policy
      • Contact Information
      • Terms of Service
      • Privacy Policy
    • FAQ
      • Troubleshooting and Helpful links
      • Install Guides
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    ALL PRODUCTS 3100-3400 ENGINE 3800 ENGINE ECOTEC ENGINE 2.2 (non ecotec) ENGINE TOYOTA ENGINE LS ENGINE TRAILBLAZER APPAREL

    Featured products

    • “Party mode” temp sensor meltdown switch

      “Party mode” temp sensor meltdown switch

      “Party mode” temp sensor meltdown switch

      Regular price $120.00 USD
      Regular price Sale price $120.00 USD
      Unit price /  per 
    • Standard Switch box

      Standard Switch box

      Standard Switch box

      Regular price $175.00 USD
      Regular price Sale price $175.00 USD
      Unit price /  per 
    • Quick Disconnect switch box

      Quick Disconnect switch box

      Quick Disconnect switch box

      Regular price $225.00 USD
      Regular price Sale price $225.00 USD
      Unit price /  per 
    • Heavy duty spark plug wires

      Heavy duty spark plug wires

      Heavy duty spark plug wires

      Regular price $40.00 USD
      Regular price Sale price $40.00 USD
      Unit price /  per 
    • 96-2005 3100/3400 harness ecm bundle package

      96-2005 3100/3400 harness ecm bundle package

      96-2005 3100/3400 harness ecm bundle package

      Regular price $495.00 USD
      Regular price Sale price $495.00 USD
      Unit price /  per 
    • 89-99 3100 harness and ecm bundle

      89-99 3100 harness and ecm bundle

      89-99 3100 harness and ecm bundle

      Regular price $525.00 USD
      Regular price Sale price $525.00 USD
      Unit price /  per 
    • 98-01 Toyota Camry (99-03 solara)(99-2000 Sienna)(98-99 Avalon)(98 Lexus es300) Harness and modded ecu Bundle

      98-01 Toyota Camry (99-03 solara)(99-2000 Sienna)(98-99 Avalon)(98 Lexus es300) Harness and modded ecu Bundle

      Sold out

      98-01 Toyota Camry (99-03 solara)(99-2000 Sienna)(98-99 Avalon)(98 Lexus es300) Harness and modded ecu Bundle

      Regular price $285.00 USD
      Regular price Sale price $285.00 USD
      Unit price /  per 
      Sold out
    • 97-99 Camry Modded ECU & Harness Bundle

      97-99 Camry Modded ECU & Harness Bundle

      Sold out

      97-99 Camry Modded ECU & Harness Bundle

      Regular price $285.00 USD
      Regular price Sale price $285.00 USD
      Unit price /  per 
      Sold out
    View all

    Let customers speak for us

    from 29 reviews
    Great company with great products and even

    Great company with great products and even better customer service

    Logan Thompson
    09/25/2025
    LMMF SIMPLIFIED WIRING
    Would not hesitate to buy anything from LMMF

    Would not hesitate to buy anything from LMMF. Great products, great customer service

    Logan Thompson
    09/25/2025
    “Party mode” temp sensor meltdown switch
    “Party mode” temp sensor meltdown switch
    good stuff havent used it yet but quaility is

    good stuff havent used it yet but quaility is good

    Callen Wenninghoff
    09/12/2025
    “Party mode” temp sensor meltdown switch
    “Party mode” temp sensor meltdown switch
    Great product

    Great product. Very simple to use.

    Bradley
    08/27/2025
    96-97 3100 Simplified harness
    96-97 3100 Simplified harness
    Great service

    Great service.

    Bradley
    08/27/2025
    00+ 3100/3400 Simplified Harness
    00+ 3100/3400 Simplified Harness
    Great to work with and very helpful

    Great to work with and very helpful. Quick shipping and delivery. Easy to install and works wonderfully.

    Shanna
    08/24/2025
    Standard Switch box
    Standard Switch box
    Exactly what I

    Exactly what I need

    Matthew
    08/19/2025
    Heavy duty spark plug wires
    Heavy duty spark plug wires
    Always what you ask

    Always what you ask for

    Charles E Thompson
    08/11/2025
    Heavy duty spark plug wires
    Heavy duty spark plug wires
    Great customer service and tech support

    Great customer service and tech support, product works amazing and make the build a breeze!

    Nathan
    08/05/2025
    98+ 3100/3400 Tuned ECM
    98+ 3100/3400 Tuned ECM
    Great experience!

    I bought a tuned ecu and simplified harness, both arrived quickly and the quality of the harness is top notch! Can’t wait to get them in a car and see how it preforms!!

    Brock
    08/04/2025
    99-02 LS HARNESS
    99-02 LS HARNESS
    Easy to install and fast

    Easy to install and fast shipping

    Brandon
    08/04/2025
    00+ 3100/3400 Simplified Harness
    00+ 3100/3400 Simplified Harness
    Easy to install and fast shipping and

    Easy to install and fast shipping and delivery

    Brandon
    08/04/2025
    LMMF SIMPLIFIED WIRING
    very easy to install and would highly recommend

    very easy to install and would highly recommend lmmf fast shipping and arrival as well

    Brandon
    08/04/2025
    98+ 3100/3400 Tuned ECM
    98+ 3100/3400 Tuned ECM
    Sorry took me so long to get back with you I

    Sorry took me so long to get back with you I just put a new motor in the car and everything else finally got it all in there the wiring harness computer everything worked out great thanks a lot

    Gary
    08/01/2025
    Standard Switch box
    Standard Switch box
    Plugged right up to harness I already had purchased and worked great

    Plugged right up to harness I already had purchased and worked great.

    Dale
    07/29/2025
    96-99 to 00+ Injector adpater pigtail
    96-99 to 00+ Injector adpater pigtail

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