Engine Control Modules

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$413 Off

Holley |

#4255501600

Holley 550-1600 Terminator X GM Gen V Early LT Kit

Ignition Type:

Factory GM

Tuner Style:

Touchscreen Handheld

Throttle Style:

Cable Driven

$2,336.95

/kit

$2,749.95

$187 Off

Holley |

#425554119

Holley 554-119 Terminator EFI ECU

Transmission Control:

GTIN Code:

090127685556

Sold in Quantity:

Each

$2,349.95

/each

$2,536.95

-7%

Holley |

#425554142

Holley 554-142 Injector Driver Module with Harness

Transmission Control:

Sold in Quantity:

Each

$659.95

/each

$714.95

$229 Off

Holley |

#425550601N

Holley EFI 550-601N HP EFI ECU And Harness Kits

Ignition Type:

Universal

Injector Connector:

GM TPI

Sold in Quantity:

Kit

$2,999.95

/each

$3,228.95

Rebate

Holley |

#425550918T

Holley 550-918T Terminator X Max LS2/LS3 MPFI Kit

Ignition Type:

Factory GM

Injector Connector:

USCAR (EV6)

Tuner Style:

USB/CAN Tuning Cable

$1,656.95

/each

$1,949.95

Benefits of Electronic Ignition System Upgrades

Upgrading to electronic ignition is a huge improvement in performance, reliability, and lower maintenance that you can add to just about any engine your project may be running. Learn all about your electronic ignition choices in this buyer's guide.

Choosing an Electronic Fuel Injection Retrofit for Your Street Rod or Muscle Car

Fuel injection is here to stay and we delve into the benefits of such retrofit systems for your classic muscle car or street rod in our EFI retrofit buyer's guide!

MSD Ignition Box: Ignition Controller Buyer's Guide

Looking for an easy performance upgrade to your ignition system? MSD's line of Ignition Control Boxes offer extreme improvements to drivability and high rpm applications. Here's a look at the differences between the 6 series line-up.

GM Gen V Engine Guide | LT & EcoTec3 Engine Specs Guide

Inside GM’s Gen V LT engine family: history, tech, and performance of each LT engine option available.

Two Pedal Tech: Finding the Best Automatic Shifter for Your Build

There are a lot of choices when it comes to automatic shifters, and we’ll help unpack all the options and features in our automatic shifter buyer’s guide

5.7 LS1 Engine Upgrades: Build Recipes for 400 HP-700+ HP

While everyone is looking for a 6.0 LS, don’t count out the original 5.7 LS1 engine for your next LS swap performance build

Vortec 4.8 LS Build: Horsepower Recipes, Specs, & Upgrades

The 4.8 LS engine is a salvage yard bargain vs the typical 5.3 or 6.0 LS and can still make great power for your LS swap needs.

Carbureted LS Intake Conversion Kit

Learn how to convert an engine using a Carbureted LS Conversion Kit, along with tips for a smooth install. Read more on the manifold and timing control module, which comes with an MSD ignition control box and wiring harness.

Combining Old and New - EMI Interference

Modern hot rodding often blends classic looks with modern tech. Integrating current tech in custom cars can face issues like radio noise and erratic gauges due to EMI. This guide helps diagnose and repair common EMI causes.

Engine Building Tool Guide

Professional insight on some useful crate engine tools that will improve your engine building experience.

$301 Off

Holley |

#425550932

Holley 550-932 Terminator X Max 24X/1X EV6 LS MPFI Kit, DBW

Ignition Type:

Factory GM

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$1,698.95

/kit

$1,999.95

Rebate

Holley |

#4255501412

Holley 550-1412 Terminator X Max, 15.5-17 Coyote Ti-VCT, EV1, DBW

Ignition Type:

Ford Coyote

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

Touchscreen Handheld

$2,973.95

/kit

$3,499.95

Rebate

Holley |

#4255501424

Holley 550-1424 Terminator X Max, 2013-Up Gen III Hemi, EV1

Ignition Type:

Gen III Hemi Coil-on-Plug

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

Touchscreen Handheld

$2,038.95

/kit

$2,399.95

$533 Off

Holley |

#4255501630

Holley 550-1630 Terminator X Max Early LT, Trans Control DBW

Ignition Type:

Factory GM

Tuner Style:

Touchscreen Handheld

Throttle Style:

Drive-By-Wire

$3,016.95

/kit

$3,549.95

$269 Off

Holley |

GTIN Code:

090127137123

$3,299.95

/each

$3,543.95

$244 Off

090127137178

$3,699.95

/each

$3,937.95

Rebate

Holley |

#425550945

Holley 550-945 Terminator X Max Ford MPFI Kit

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

Touchscreen Handheld

Throttle Style:

Cable Driven

$1,698.95

/kit

$1,999.95

Rebate

Holley |

#4255501313

Holley 550-1313 Terminator X Max, 13-15 Coyote Ti-VCT, EV6, 4R70W

Ignition Type:

Ford Coyote

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$2,973.95

/kit

$3,499.95

Rebate

Holley |

#4255501423

Holley 550-1423 Terminator X Max, 2007-12 Gen III Hemi, EV6

Ignition Type:

Gen III Hemi Coil-on-Plug

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$2,038.95

/kit

$2,399.95

$496 Off

Holley |

#4255501620

Holley 550-1620 Terminator X Max GM Early LT, Drive-by-Wire

Ignition Type:

Factory GM

Tuner Style:

Touchscreen Handheld

Throttle Style:

Drive-By-Wire

$2,803.95

/kit

$3,299.95

$496 Off

Holley |

#4255501620LSD

Holley 550-1620LSD Terminator X Max GM Early LT, Drive-by-Wire

Ignition Type:

Factory GM

Tuner Style:

Touchscreen Handheld

Throttle Style:

Drive-By-Wire

$2,803.95

/kit

$3,299.95

$229 Off

Holley |

#425550605N

Holley EFI 550-605N HP EFI ECU And Harness Kits

Ignition Type:

Universal

GTIN Code:

090127687482

Sold in Quantity:

Kit

$2,999.95

/each

$3,228.95

$496 Off

Holley |

#4255501621

Holley 550-1621 Terminator X Max GM Late LT, Drive-by-Wire

Ignition Type:

Factory GM

Tuner Style:

Touchscreen Handheld

Throttle Style:

Drive-By-Wire

$2,803.95

/kit

$3,299.95

-7%

Holley |

#425554143

Holley 554-143 Injector Driver Module, Programmable, 8 Channel

Transmission Control:

Sold in Quantity:

Each

$659.95

/each

$714.95

-6%

MSD 2912 Hand Held Module for Atomic TBI

MSD |

#5472912

MSD 2912 Hand Held Module for Atomic TBI

Tuner Style:

Handheld Controller

Transmission Control:

Sold in Quantity:

Each

$461.95

/each

$494.95

$533 Off

Holley |

#4255501630LSD

Holley 550-1630LSD Terminator X Max Early LT, Trans Control DBW

Ignition Type:

Factory GM

Tuner Style:

Touchscreen Handheld

Throttle Style:

Drive-By-Wire

$3,016.95

/kit

$3,549.95

$242 Off

Holley |

#425550607N

Holley 550-607N HP EFI ECU & Harness Kit, LS2/LS3/LS7, NTK O2

Ignition Type:

Factory GM

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

USB/CAN Tuning Cable

$3,099.95

/each

$3,341.95

Showing 1 - 108 of 163 results

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Engine Control Modules

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Products

Holley 550-1600 Terminator X GM Gen V Early LT Kit

Holley 554-119 Terminator EFI ECU

Holley 554-142 Injector Driver Module with Harness

Holley EFI 550-601N HP EFI ECU And Harness Kits

Holley 550-918T Terminator X Max LS2/LS3 MPFI Kit

Related Articles

Holley 550-932 Terminator X Max 24X/1X EV6 LS MPFI Kit, DBW

Holley 550-1412 Terminator X Max, 15.5-17 Coyote Ti-VCT, EV1, DBW

Holley 550-1424 Terminator X Max, 2013-Up Gen III Hemi, EV1

Holley 550-1630 Terminator X Max Early LT, Trans Control DBW

Holley 550-655 Dominator EFI Kit, COP Main Harness, Ford, EV1

Holley 550-628N Ford Coyote Ti-VCT Capable HP EFI Kit, NTK O2

Holley 550-605 HP EFI ECU & Harness Kit, Universal, Unterminated

Holley 550-950 Terminator X Max Universal MPFI Kit

Holley 550-1221 Terminator X, Ford Mod 2V or 4V, Smart Coils, EV6

Holley 550-1220 Terminator X, Ford Mod 2V or 4V, Smart Coils, EV1

Holley EFI 550-653 Dominator EFI Kit, Ford Main Harness, EV1

Holley EFI 550-651 Dominator EFI Kit LS2 Main Harness EV1 Harness

Holley 550-1409 Terminator X Max, 11-12 Coyote Ti-VCT, EV6, DBW

Holley 550-1631LSD Terminator X Max Late LT, Trans Control DBW

Holley 550-929T Terminator X Max LS1 MPFI Kit

Holley 550-602N HP EFI ECU & Harness Kit, LS1/LS6, NTK O2

Holley 550-1216 Terminator X, Ford Modular 2V, EV1 Injectors

Holley 550-1223 Terminator X, 2003-06 Gen III Hemi, EV6 Injectors

Holley 550-1318 Terminator X Max, Ford Modular 4V, EV1 Injectors

Holley EFI 550-657 Dominator EFI Kit, LS1 Main Harness, EV1

Holley 550-945 Terminator X Max Ford MPFI Kit

Holley 550-1313 Terminator X Max, 13-15 Coyote Ti-VCT, EV6, 4R70W

Holley 550-1423 Terminator X Max, 2007-12 Gen III Hemi, EV6

Holley 550-1620 Terminator X Max GM Early LT, Drive-by-Wire

Holley 550-1620LSD Terminator X Max GM Early LT, Drive-by-Wire

Holley EFI 550-605N HP EFI ECU And Harness Kits

Holley 550-1621 Terminator X Max GM Late LT, Drive-by-Wire

Holley 554-143 Injector Driver Module, Programmable, 8 Channel

MSD 2912 Hand Held Module for Atomic TBI

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Holley 550-607N HP EFI ECU & Harness Kit, LS2/LS3/LS7, NTK O2

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