EFI Wiring Harness

Choose the Right Five Position Tuning Switch for Your Diesel Truck

Evil Energy SOTF switches and DSP5 switches let drivers select between compatible custom tune files without reflashing the vehicle through the OBD2 port each time. This collection covers selected Cummins, Powerstroke and Duramax diesel applications. These products are tuning switches with application specific wiring. They are not complete engine wiring harnesses, EFI wiring harnesses or replacement vehicle electrical systems.

Application Supported Tuning Connection Method
2010 to 2020 Dodge Ram 6.7L Cummins EZ LYNK or EFI Live with a compatible SOTF calibration Included connectors, ECU fuel temperature sensor wiring and firewall routing
2011 to 2020 Ford 6.7L Powerstroke EZ LYNK or SCT with a compatible SOTF calibration Two included Posi Tap connectors with no wire cutting required
Chevy and GMC 6.6L Duramax EFI Live DSP5 for LB7 and LBZ or LMM; EFI Live or EZ LYNK for LML Application specific color coded leads connected to the listed ECM pin locations

What Must Be Ready Before You Install an SOTF or DSP5 Switch?

A five position switch does not create or supply engine tunes. Your truck must already have a compatible multi tune calibration prepared for the correct tuning platform. Before ordering, verify the vehicle year, engine family, tuning software and ECM connection method. Duramax owners must select the exact LB7, LBZ or LMM, or LML version because the wire colors, ECM pin locations and supported tuning platforms are different. If you need a complete fuel injection wiring harness, relay box or fuse block, these switches are not the correct product type.

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EVIL ENERGY PTFE Hose End Fitting for PTFE Hose Only (3/4/6/8/10/12AN) - Black - EVILENERGY[Straight,1PC]
EVIL ENERGY PTFE Hose End Fitting for PTFE Hose Only (3/4/6/8/10/12AN) - Black

Engineered for high-pressure, high-temperature fuel systems, the EVIL ENERGY PTFE Hose End Fitting delivers leak-proof performance for PTFE fuel lines in performance builds, LS swaps, boosted engines, and ethanol-based fuel setups. Made from 6061-T6 aluminum with a 360° swivel design, these AN fittings ensure a clean, secure, and easy-to-assemble connection—ideal for builders who demand durability and precision.

$8.99
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[Black,Without Bracket] black inline evil energy fuel filter with directional arrow and multiple AN fuel line fittingsevil energy fuel filter kit with stainless steel inline fuel filter, AN fittings, and mounting hardware
EVIL ENERGY Inline Fuel Filter with 6AN 8AN 10AN Adapter and Bracket Universal 10/30/40/100 Micron - Black

[Application] Universal fuel filter, includes an6, an8, an10 adapters for different size applications. With mounting bracket keeps the engine bar stylish and clean.

  • [Material] Aluminum alloy fuel filter can and stainless steel filter element.
  • [O-ring] The o-ring provides a tight seal for fittings and end caps.
  • [Function] Can be used for filtering gasoline, diesel, etc. Captures contaminant particles of 10 micron and above to protect the fuel system of the vehicle.
  • [Feature] Removable design, easy to clean or replace filter element at regular time.
  • [Installation Tips] We have debugged the installation direction of the fuel filters before delivery. Please check and ensure the closed end of the filter element docks with the spring. Let the liquid flow following the arrow from the spring end to the other end, and the fuel filter will serve longer.
$23.99
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$24.99
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[20FT] EVIL ENERGY PTFE Fuel Line Kit, complete black hose & fittings set, 180-day return[16FT] EVIL ENERGY PTFE Fuel Line Kit, black braided hose, fittings, free shipping & return
EVIL ENERGY 4/6/8/10AN PTFE Fuel Line Kit | E85 Nylon Braided Hose | 16/20FT Black Black with Comprehensive Fittings

Three-Layer Construction: Our fuel lines are constructed with a triple-layer material for unparalleled performance and protection. The innermost layer is made of PTFE for maximum chemical resistance, a braided stainless steel layer for strength and durability, and an outer nylon layer for added abrasion resistance and protection.

Multiple Sizes: We offer our fuel lines in 4AN, 6AN, 8AN, and 10AN sizes, catering to the diverse needs of various fuel delivery systems.

Fitting Types: Our kit includes a variety of fittings at 0°, 90°, 45°, and 180° angles, ensuring versatility and flexibility during installation, allowing for custom routing in tight or complex spaces.

Precision Fit and Leak-Free Performance: The combination of the PTFE inner layer and the high-quality aluminum hose ends ensures a precision fit and leak-free connection, even under extreme pressure, providing a safe and reliable fuel system.

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[1 PC][2 PCS]
EVIL ENERGY AN Flare to AN ORB Male Fuel Rail Adapter Fitting
  • AN to ORB Conversion
    Converts AN flare fittings to ORB ports for fuel rails and aftermarket fuel components.
  • High Pressure Capability
    Rated up to 1500 PSI for reliable performance in fuel and oil systems.
  • Leak Free Sealing Design
    37 degree AN flare seal combined with ORB O ring ensures a secure, leak resistant connection.
  • CNC Machined Aluminum
    Made from 6061 T6 aluminum with black anodized finish for corrosion resistance.
  • Wide Size Availability
    Multiple AN sizes available to support custom fuel system layouts.
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  • EVIL ENERGY 5 Position SOTF Switch for 2010–2020 Dodge Ram 6.7L Cummins Diesel - EVILENERGYEVILENERGY SOTF Switch Compatible for 2010-2020 Dodge Ram 6.7L Cummins, 5-Position Fuel Temp Shift-On-The-Fly Switch with Connector
    EVIL ENERGY 5 Position SOTF Switch for 2010–2020 Dodge Ram 6.7L Cummins Diesel
    • Real-Time Tune Control – Instantly switch between 5 Positions: Economy, Tow, Performance, and Race.
    • Premium EVIL ENERGY Build – CNC-machined aluminum knob with knurled grip and high-temp wiring.
    • Perfect Compatibility – Works seamlessly with EZ Lynk and EFI Live SOTF tuning systems.
    • Easy Installation – OEM-style connectors, split-loom protection, and no wire cutting required.
    • Tailored for Cummins – Designed exclusively for 2010–2020 Dodge Ram 6.7L Cummins Diesel.
    $45.00
    $45.00
    $45.00
  • EVIL ENERGY 5 Position SOTF Switch for 2011–2020 Ford 6.7L Powerstroke - EVILENERGYEVILENERGY SOTF Switch Compatible for 2011-2020 Ford 6.7L Powerstroke, 5-Position Fuel Temp Shift-On-The-Fly Switch with Connector
    EVIL ENERGY 5 Position SOTF Switch for 2011–2020 Ford 6.7L Powerstroke
    • Real-time tuning control with 5 driving Positions (Economy–Race)
    • Designed for 2011–2020 Ford 6.7L Powerstroke, works with EZ LYNK & SCT
    • Knurled aluminum knob + high-temp wiring for durability in engine bay heat
    • DIY-friendly install with Posi-Tap connectors, no wire cutting required
    • Mounts easily in cabin: dashboard, switch panel, or center console
    $44.00
    $44.00
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  • [2001–2004 LB7][2006-2010 LBZ/LMM]
    EVIL ENERGY DSP5 SOTF Switch for EFI Live Tuning | Duramax 6.6L LB7 LBZ LMM LML (2001–2016)
    • Real-Time Tuning – Instantly switch between five custom EFI Live or EZ LYNK tunes without reprogramming.
    • Vehicle-Specific Fitment – Available for 2001–2004 LB7, 2006–2010 LBZ/LMM, and 2011–2016 LML Duramax engines.
    • Durable Build – Features a knurled aluminum knob, heat-resistant wires, and protective loom for long-lasting reliability.
    • Easy Installation – Color-coded leads and included guide make it simple for DIY or professional installs.
    • Driver-Centric Design – Mounts neatly inside the cabin for smooth, reliable switching while driving.
    $38.99
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FAQs about EFI Wiring Harness

Are Evil Energy SOTF switch harnesses compatible with all car models?

No. Evil Energy SOTF and DSP5 switch wiring is vehicle and tuning platform specific. The current options cover selected 2010 to 2020 Dodge Ram 6.7L Cummins, 2011 to 2020 Ford 6.7L Powerstroke, and specified Chevy or GMC 6.6L Duramax applications. Match the vehicle year, engine family and tuning software before ordering. A matching connector does not confirm calibration compatibility.

Evil Energy SOTF and DSP5 switches provide access to five compatible custom tune positions from a cabin mounted rotary control. Depending on the selected product, features include a 6061 T6 aluminum knob, heat resistant wiring, protective split loom, color coded leads, application specific connectors and an installation guide. The switch only selects tunes that have already been written to the ECU or ECM. It does not create, download or modify a calibration by itself.

The installation method depends on the application. The Cummins option uses included connectors with the ECU fuel temperature sensor circuit and does not require wire cutting according to the product instructions. The Ford Powerstroke option includes two Posi Tap connectors and also does not require wire cutting. Duramax versions use application specific color coded leads connected to designated ECM pins, so they should not be described as a universal plug and play harness. Follow the instructions for the exact engine code.

Common wiring harness issues usually fall into five areas:

  1. Incorrect engine version
    The selected SOTF or DSP5 switch does not match the vehicle year, engine family or ECM configuration.
  2. Unsupported tuning platform
    The switch is connected to EFI Live, EZ LYNK or SCT software that the selected product does not support.
  3. Missing compatible calibration
    A compatible multi tune calibration has not been loaded into the ECU or ECM before the switch is installed.
  4. Incorrect or loose connection
    A lead is connected to the wrong ECM pin, a connector is not fully seated, or a Posi Tap connection is loose.
  5. Unsafe wire routing
    The wiring is routed too close to exhaust heat, sharp edges or moving components, increasing the risk of heat damage, abrasion or an intermittent signal.

If the switch does not change tune positions, check the system in this order:

  1. Confirm the vehicle year and engine version.
  2. Verify that the tuning platform is supported.
  3. Confirm that a compatible multi tune calibration has been loaded.
  4. Recheck every connector, ground and ECM pin location.
  5. Inspect the wiring for heat damage, abrasion or loose connections.

Do not replace the switch until the vehicle application, tuning compatibility and all electrical connections have been verified.

First determine whether you need a complete engine wiring harness or only a tuning switch. The products in this collection do not include an ECU harness, injector wiring, relay center or fuse box. Customers searching for the best wiring harnesses with fuse boxes for automotive use should verify engine generation, ECU or ECM model, throttle type, transmission, injector connector type, circuit count, relay capacity, harness length and whether external splicing is required. Do not purchase an SOTF or DSP5 switch as a replacement for a complete EFI wiring harness.

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