EFI Systems and Components

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  HOLLEY EFI TERMINATOR X MAX – GEN III 4.8/5.3/6.0 GM TRUCK ENGINES 24x Crank – 1x Cam – Multec 2 Injectors – Drive-By-Wire Throttle Body and Transmission Control – 3.5 in. Touchscreen Part # 550-927

  $2,287.00 Original price was: $2,287.00.$1,799.95Current price is: $1,799.95.
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  HOLLEY EFI TERMINATOR X MAX – GEN III 4.8/5.3/6.0 GM TRUCK ENGINES 24x Crank – 1x Cam – Multec 2 Injectors – Drive-By-Wire Throttle Body Control – 3.5 in. Touchscreen Part # 550-930

  $2,033.00 Original price was: $2,033.00.$1,695.95Current price is: $1,695.95.
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  HOLLEY EFI TERMINATOR X MAX – GEN III 4.8/5.3/6.0 GM TRUCK ENGINES 24x Crank – 1x Cam – Multec 2 Injectors – Transmission Control – 3.5 in. Touchscreen Part # 550-917

  $2,033.00 Original price was: $2,033.00.$1,645.95Current price is: $1,645.95.
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  HOLLEY EFI TERMINATOR X MAX – GEN IV 4.8/5.3/6.0 GM TRUCK ENGINES AND LS2/LS3 58x Crank – 4x Cam – EV1 Injectors – Drive-By-Wire Throttle Body and Transmission Control – 3.5 in. Touchscreen Part # 550-935

  $2,287.00 Original price was: $2,287.00.$1,907.95Current price is: $1,907.95.
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  HOLLEY EFI TERMINATOR X MAX – GEN IV 4.8/5.3/6.0 GM TRUCK ENGINES AND LS2/LS3 58x Crank – 4x Cam – EV1 Injectors – Drive-By-Wire Throttle Body Control – 3.5 in. Touchscreen Part # 550-933

  $2,033.00 Original price was: $2,033.00.$1,695.95Current price is: $1,695.95.
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  HOLLEY EFI TERMINATOR X MAX – GEN IV 4.8/5.3/6.0 GM TRUCK ENGINES AND LS2/LS3 58x Crank – 4x Cam – EV1 Injectors – Transmission Control – 3.5 in. Touchscreen Part # 550-920

  $2,033.00 Original price was: $2,033.00.$1,645.95Current price is: $1,645.95.
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  HOLLEY EFI TERMINATOR X MAX – GEN IV 4.8/5.3/6.0 GM TRUCK ENGINES AND LS2/LS3 58x Crank – 4x Cam – EV6 Injectors – Drive-By-Wire Throttle Body and Transmission Control – 3.5 in. Touchscreen Part # 550-928

  $2,287.00 Original price was: $2,287.00.$1,799.95Current price is: $1,799.95.
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  HOLLEY EFI TERMINATOR X MAX – GEN IV 4.8/5.3/6.0 GM TRUCK ENGINES AND LS2/LS3 58x Crank – 4x Cam – EV6 Injectors – Drive-By-Wire Throttle Body Control – 3.5 in. Touchscreen Part # 550-931

  $2,033.00 Original price was: $2,033.00.$1,645.95Current price is: $1,645.95.
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  HOLLEY EFI TERMINATOR X MAX – GEN IV 4.8/5.3/6.0 GM TRUCK ENGINES AND LS2/LS3 58x Crank – 4x Cam – EV6 Injectors – Transmission Control – 3.5 in. Touchscreen Part # 550-918

  $2,033.00 Original price was: $2,033.00.$1,645.95Current price is: $1,645.95.
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  HOLLEY EFI TERMINATOR X MAX – GEN IV 4.8/5.3/6.0 GM TRUCK ENGINES AND LS2/LS3 58x Crank – 4x Cam – EV6 Injectors – Transmission Control – USB/CAN Tuning Cable Part # 550-918T

  $1,969.00 Original price was: $1,969.00.$1,594.95Current price is: $1,594.95.
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  HOLLEY EFI TERMINATOR X MAX – LS1/LS6 24x Crank – 1x Cam – EV1 Injectors – Drive-By-Wire Throttle Body and Transmission Control – 3.5 in. Touchscreen Part # 550-926

  $2,287.00 Original price was: $2,287.00.$1,907.95Current price is: $1,907.95.
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  HOLLEY EFI TERMINATOR X MAX – LS1/LS6 24x Crank – 1x Cam – EV1 Injectors – Drive-By-Wire Throttle Body Control – 3.5 in. Touchscreen Part # 550-929

  $2,033.00 Original price was: $2,033.00.$1,695.95Current price is: $1,695.95.
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  HOLLEY EFI TERMINATOR X MAX – LS1/LS6 24x Crank – 1x Cam – EV1 Injectors – Transmission Control – 3.5 in. Touchscreen Part # 550-916

  $2,033.00 Original price was: $2,033.00.$1,645.95Current price is: $1,645.95.
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  HOLLEY EFI TERMINATOR X MAX – LS1/LS6 24x Crank – 1x Cam – EV1 Injectors – Transmission Control – USB/CAN Tuning Cable Part # 550-916T

  $1,969.00 Original price was: $1,969.00.$1,641.95Current price is: $1,641.95.
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  HOLLEY EFI TERMINATOR X MAX – LS1/LS6 24x Crank – 1x Cam – EV6 Injectors – Drive-By-Wire Throttle Body and Transmission Control – 3.5 in. Touchscreen Part # 550-934

  $2,287.00 Original price was: $2,287.00.$1,799.95Current price is: $1,799.95.
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  HOLLEY EFI TERMINATOR X MAX – LS1/LS6 24x Crank – 1x Cam – EV6 Injectors – Drive-By-Wire Throttle Body Control – 3.5 in. Touchscreen Part # 550-932

  $2,033.00 Original price was: $2,033.00.$1,695.95Current price is: $1,695.95.
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  HOLLEY EFI TERMINATOR X MAX – LS1/LS6 24x Crank – 1x Cam – EV6 Injectors – Transmission Control – 3.5 in. Touchscreen Part # 550-919

  $2,033.00 Original price was: $2,033.00.$1,645.95Current price is: $1,645.95.
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  Holley EFI Terminator X Universal MPFI Kit Part # 550-936

  $1,587.00 Original price was: $1,587.00.$1,284.95Current price is: $1,284.95.
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  HOLLEY EFI HOLLEY LCD TOUCH SCREEN Wide range of tuning and data-monitoring options in a compact 3.5″ LCD display Part # 553-108

  $416.95 Original price was: $416.95.$369.95Current price is: $369.95.
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  HOLLEY EFI HOLLEY STANDALONE DIGITAL DASH KIT 7″ Digital Dash, Compact & Fully Customizable! Part # 553-109

  $1,627.95 Original price was: $1,627.95.$1,446.95Current price is: $1,446.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS Complete 99-04 2 Valve Ford Modular Engine Plug and Play Kit – Jetronic “Bosch Style” injector harness – Bosch Wideband O2 Part # 550-616

  $3,374.95 Original price was: $3,374.95.$2,999.95Current price is: $2,999.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS Complete 99-04 2 Valve Ford Modular Engine Plug and Play Kit – Jetronic “Bosch Style” injector harness – Includes NTK Oxygen Sensor Part # 550-616N

  $3,656.95 Original price was: $3,656.95.$3,249.95Current price is: $3,249.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS Complete 99-04 4 Valve Ford Modular Engine Plug and Play Kit – Jetronic “Bosch Style” injector harness – Bosch Wideband O2 Part # 550-617

  $3,374.95 Original price was: $3,374.95.$2,999.95Current price is: $2,999.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS Complete 99-04 4 Valve Ford Modular Engine Plug and Play Kit – Jetronic “Bosch Style” injector harness – Includes NTK Oxygen Sensor Part # 550-617N

  $3,656.95 Original price was: $3,656.95.$3,249.95Current price is: $3,249.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS GM LS1/LS6 (24x crank sensor) with Jetronic/Minitimer (Bosch type) connectors on injector harness (fits Holley 522-xxx injectors), Includes Bosch Oxygen Sensor Part # 550-602

  $2,924.95 Original price was: $2,924.95.$2,599.95Current price is: $2,599.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS GM LS1/LS6 (24x crank sensor) with Jetronic/Minitimer (Bosch type) connectors on injector harness (fits Holley 522-xxx injectors), Includes NTK Oxygen Sensor Part # 550-602N

  $3,206.95 Original price was: $3,206.95.$2,849.95Current price is: $2,849.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS GM LS2/3/7 (58x crank sensor) with Jetronic/Minitimer (Bosch type) connectors on injector harness (fits Holley 522-xxx injectors), Includes Bosch Oxygen Sensor Part # 550-607

  $2,924.95 Original price was: $2,924.95.$2,599.95Current price is: $2,599.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS GM LS2/3/7 (58x crank sensor) with Jetronic/Minitimer (Bosch type) connectors on injector harness (fits Holley 522-xxx injectors), Includes NTK Oxygen Sensor Part # 550-607N

  $3,206.95 Original price was: $3,206.95.$2,849.95Current price is: $2,849.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS GM LS2/3/7 (58x crank sensor) with USCAR (EV6 Style) connectors on injector harness, Includes Bosch Oxygen Sensor Part # 550-603

  $2,924.95 Original price was: $2,924.95.$2,599.95Current price is: $2,599.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS GM LS2/3/7 (58x crank sensor) with USCAR (EV6 Style) connectors on injector harness, Includes NTK Oxygen Sensor Part # 550-603N

  $3,206.95 Original price was: $3,206.95.$2,849.95Current price is: $2,849.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS GM TPI and Holley Stealth Ram™, Includes Bosch Oxygen Sensor Part # 550-601

  $2,812.95 Original price was: $2,812.95.$2,499.95Current price is: $2,499.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS GM TPI and Holley Stealth Ram™, Includes NTK Oxygen Sensor Part # 550-601N

  $3,093.95 Original price was: $3,093.95.$2,749.95Current price is: $2,749.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS Universal FORD V8 Multi-Point Fuel Injection, Includes Bosch Oxygen Sensor, and Ford V8 Injector Harness. Part # 550-606

  $2,812.95 Original price was: $2,812.95.$2,499.95Current price is: $2,499.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS Universal FORD V8 Multi-Point Fuel Injection, Includes NTK Oxygen Sensor, and Ford V8 Injector Harness. Part # 550-606N

  $3,093.95 Original price was: $3,093.95.$2,749.95Current price is: $2,749.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS Universal V8 Multi-Point Fuel Injection, Includes Bosch Oxygen Sensor Part # 550-604

  $2,812.95 Original price was: $2,812.95.$2,499.95Current price is: $2,499.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS Universal V8 Multi-Point Fuel Injection, Includes NTK Oxygen Sensor Part # 550-604N

  $3,093.95 Original price was: $3,093.95.$2,749.95Current price is: $2,749.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS Unterminated Universal Harness, Includes Bosch Oxygen Sensor Part # 550-605

  $2,812.95 Original price was: $2,812.95.$2,499.95Current price is: $2,499.95.
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  HOLLEY EFI HP EFI ECU & HARNESS KITS Unterminated Universal Harness, Includes NTK Oxygen Sensor Part # 550-605N

  $3,093.95 Original price was: $3,093.95.$2,749.95Current price is: $2,749.95.
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  HOLLEY EFI HP EFI ECU HP EFI ECU, USB Cable, and Software Part # 554-113

  $1,958.95 Original price was: $1,958.95.$1,740.95Current price is: $1,740.95.
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  HOLLEY EFI INJECTOR DRIVER HARNESS Part # 558-219

  $323.95 Original price was: $323.95.$287.95Current price is: $287.95.
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  HOLLEY EFI INJECTOR HARNESS – EARLY TRUCK LS MULTEC 2 INJECTOR HARNESS – EARLY TRUCK Part # 558-214

  $284.95 Original price was: $284.95.$252.95Current price is: $252.95.
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  HOLLEY EFI LS COIL EXTENSION HARNESSES Designed to extend your factory coil harness, allowing you to easily remote mount your LS ignition coils. Part # 558-326

  $131.95 Original price was: $131.95.$116.95Current price is: $116.95.
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  HOLLEY EFI LS COIL HARNESSES Factory replacement coil harness for stock LS coils, does not fit LS1 or LS6 Coils. Part # 558-321

  $202.95 Original price was: $202.95.$179.95Current price is: $179.95.
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  HOLLEY EFI LS1/6 (24X/1X) ENGINE MAIN HARNESS LS1/6 Main Harness for HP EFI & Dominator EFI Part # 558-102

  $653.95 Original price was: $653.95.$580.95Current price is: $580.95.
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  HOLLEY EFI LS1/6 (24X/1X) ENGINE MAIN HARNESS, EXTENDED LENGTH LS1/6 Main Harness for HP EFI & Dominator EFI Part # 558-133

  $695.95 Original price was: $695.95.$617.95Current price is: $617.95.
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  HOLLEY EFI LS2/3/7+ (58X/4X) ENGINE MAIN HARNESS EXTENDED LENGTH LS2/3/7+ (58x/4x) Engine Main Harness for HP EFI & Dominator EFI Part # 558-134

  $695.95 Original price was: $695.95.$617.95Current price is: $617.95.
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  HOLLEY EFI LS2/3/7+ (58X/4X) ENGINE MAIN HARNESS LS2/3/7+ (58x/4x) Engine Main Harness for HP EFI & Dominator EFI Part # 558-103

  $653.95 Original price was: $653.95.$580.95Current price is: $580.95.
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  HOLLEY EFI LSX INJECTOR HARNESS – FOR EV6 STYLE INJECTORS LSx Injector Harness for HP EFI, Dominator EFI and Terminator X. Part # 558-201

  $178.95 Original price was: $178.95.$158.95Current price is: $158.95.
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  HOLLEY EFI MAIN ENGINE HARNESS FOR 24X LS W/TBI Main Harness for us with 24x/1x Gen 3 LS with Terminator Throttle Body Fuel Injection Part # 558-111

  $722.95 Original price was: $722.95.$641.95Current price is: $641.95.
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  HOLLEY EFI MAIN ENGINE HARNESS FOR 58X LS W/TBI Main Harness for us with 58x/4x Gen 4 LS with Terminator Throttle Body Fuel Injection Part # 558-112

  $735.95 Original price was: $735.95.$653.95Current price is: $653.95.