Mercury Mercury Engine Control Modules

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$282 Off

Holley |

#425550659

Holley 550-659 Dominator EFI Kit, LS2 Main Harness, GM, EV1

Data Acquisition Replacement Component Type:

Dominator ECU - ECM - VCM

Sold in Quantity:

Kit

$3,599.95

/kit

$3,881.95

$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

Edelbrock |

#32535711

Edelbrock 35711 Pro-Flo 4 ECU/Harness For Gen III 28X LS Engines

GTIN Code:

085347357116

Sold in Quantity:

Kit

$1,222.95

/each

-7%

Holley |

#425554143

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

Transmission Control:

Sold in Quantity:

Each

$659.95

/each

$714.95

Replacing Sway Bars in a Mercury Comet

How to replace sway bars in a Mercury Comet and the advantages that come with it.

Tubular Control Arms on an S-10

In this Tech Tip, John responds to a customer question about tubular control arms.

Car Cooling System Components

How does a cooling system work? Why is your engine overheating? What parts should you be giving your attention to? This guide answers all your questions.

Engine Cylinder Numbers

Lower Control Arm Upgrade

Have a 1970-1994 GM A- or X-body in need of some new lower control arms? Take a look at what Speedway Motors' employee Steve L. has to say about our lower control arms!

Gen III/IV LS Engine ID Guide

Looking to swap the venerable LS engine into your hot rod, muscle car, or classic truck? Take a look at our detailed identification guide for Gen III/IV LS engines before you hit the salvage yard or swap meet!

Historic Indy Engines

To celebrate the upcoming 106th running of the Indianaplis 500, here's a look back at a few of the engines that have competed at the Brickyard over the years.

Engine Building Tool Guide

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

Leak Down Check on a Micro Sprint Engine

It is most certainly an important procedure and should be part of a weekly maintenance routine.

Approved Upgrades for the GM Crate 602/604

Tips and tricks to pull the most from your GM 602/604 platform.

$200 Off

Holley |

#425554114

Holley 554-114 Dominator EFI ECU

Ignition Type:

Universal

GTIN Code:

090127665794

Sold in Quantity:

Each

$2,499.95

/each

$2,699.95

$210 Off

Holley |

#425550602

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

Ignition Type:

Factory GM

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

USB/CAN Tuning Cable

$2,849.95

/each

$3,059.95

$210 Off

Holley |

#425550603

Holley 550-603 HP EFI ECU & Harness Kit, LS2/LS3/LS7, Bosch O2

Ignition Type:

Factory GM

Injector Connector:

USCAR (EV6)

Tuner Style:

USB/CAN Tuning Cable

$2,849.95

/each

$3,059.95

$187 Off

Holley |

#425550604

Holley 550-604 HP EFI ECU & Harness Kit, Universal, Bosch O2

Ignition Type:

Universal

Injector Connector:

Jetronic / Minitimer (EV1)

Sold in Quantity:

Kit

$2,749.95

/each

$2,936.95

Rebate

Holley |

#425550903

Holley 550-903 Terminator X LS1/LS6 MPFI Kit

(2)

Ignition Type:

Factory GM

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

Touchscreen Handheld

$1,358.95

/each

$1,599.95

Rebate

Holley |

#425550905

Holley 550-905 Terminator X LS2/LS3 MPFI Kit

Ignition Type:

Factory GM

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$1,358.95

/each

$1,599.95

$241 Off

Holley |

#425550910

Holley 550-910 Terminator X 58X/4X EV1 LS MPFI Kit

Ignition Type:

Factory GM

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

Touchscreen Handheld

$1,358.95

/kit

$1,599.95

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 |

#425550917

Holley 550-917 Terminator X Max Early Truck Engine MPFI Kit

(3)

Ignition Type:

Factory GM

Injector Connector:

Multec 2

Tuner Style:

Touchscreen Handheld

$1,698.95

/each

$1,999.95

$301 Off

Holley |

#425550919

Holley 550-919 Terminator X Max 24X/1X EV6 LS MPFI Trans Control

(1)

Ignition Type:

Factory GM

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$1,698.95

/kit

$1,999.95

Rebate

Holley |

#425550928

Holley 550-928 Terminator X Max LS2/LS3 MPFI Kit

Ignition Type:

Factory GM

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$1,868.95

/each

$2,199.95

Rebate

Holley |

#425550931

Holley 550-931 Terminator X Max LS2/LS3 MPFI Kit

Ignition Type:

Factory GM

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$1,698.95

/each

$1,999.95

$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

$331 Off

Holley |

#425550934

Holley 550-934 Terminator X Max 24X/1X EV6 LS MPFI Kit, DBW

Ignition Type:

Factory GM

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$1,868.95

/kit

$2,199.95

Rebate

Holley |

#425550937

Holley 550-937 Terminator X Ford MPFI Kit

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

Touchscreen Handheld

Throttle Style:

Cable Driven

$1,358.95

/kit

$1,599.95

$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

$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

$533 Off

Holley |

#4255501631

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

Ignition Type:

Factory GM

Tuner Style:

Touchscreen Handheld

Throttle Style:

Drive-By-Wire

$3,016.95

/kit

$3,549.95

Rebate

Holley |

#4255501211

Holley 550-1211 Terminator X, 2011-2012 Ford Coyote Ti-VCT, EV6

Ignition Type:

Ford Coyote

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$2,676.95

/kit

$3,149.95

Rebate

Holley |

#4255501212

Holley 550-1212 Terminator X, 2013-2015 Ford Coyote Ti-VCT, EV1

Ignition Type:

Ford Coyote

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

Touchscreen Handheld

$2,676.95

/kit

$3,149.95

Rebate

Holley |

#4255501214

Holley 550-1214 Terminator X, 2015.5-17 Ford Coyote Ti-VCT, EV1

Ignition Type:

Ford Coyote

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

Touchscreen Handheld

$2,676.95

/kit

$3,149.95

Rebate

Holley |

#4255501223

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

Ignition Type:

Gen III Hemi Coil-on-Plug

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$1,741.95

/kit

$2,049.95

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 |

#4255501317

Holley 550-1317 Terminator X Max, Ford Modular 2V, EV6 Injectors

Ignition Type:

Ford 2V Mod Stock Coils

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$2,038.95

/kit

$2,399.95

Rebate

Holley |

#4255501318

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

Ignition Type:

Ford 4V Mod Stock Coils

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

Touchscreen Handheld

$2,038.95

/kit

$2,399.95

Rebate

Holley |

#4255501409

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

Ignition Type:

Ford Coyote

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$2,973.95

/kit

$3,499.95

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 |

#4255501413

Holley 550-1413 Terminator X Max, 15.5-17 Coyote Ti-VCT, EV6, DBW

Ignition Type:

Ford Coyote

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$2,973.95

/kit

$3,499.95

Rebate

Holley |

#425550903T

Holley 550-903T Terminator X LS1 MPFI Kit

Ignition Type:

Factory GM

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

USB/CAN Tuning Cable

$1,231.95

/each

$1,449.95

$218 Off

Holley |

#425550905T

Holley 550-905T Terminator X 58X/4X EV6 LS MPFI Kit

Ignition Type:

Factory GM

Injector Connector:

USCAR (EV6)

Tuner Style:

USB/CAN Tuning Cable

$1,231.95

/kit

$1,449.95

$218 Off

Holley |

#425550909T

Holley 550-909T Terminator X 24X/1X EV1 LS MPFI Kit

Ignition Type:

Factory GM

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

USB/CAN Tuning Cable

$1,231.95

/kit

$1,449.95

Showing 1 - 36 of 125 results

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Mercury Mercury Engine Control Modules

Ignition Type

Brand

Transmission Family

Availability

Discounts

Engine Family

Price

Customer Rating

Products

Holley 550-659 Dominator EFI Kit, LS2 Main Harness, GM, EV1

Holley 554-119 Terminator EFI ECU

Holley 554-142 Injector Driver Module with Harness

Edelbrock 35711 Pro-Flo 4 ECU/Harness For Gen III 28X LS Engines

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

Related Articles

Holley 554-114 Dominator EFI ECU

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

Holley 550-603 HP EFI ECU & Harness Kit, LS2/LS3/LS7, Bosch O2

Holley 550-604 HP EFI ECU & Harness Kit, Universal, Bosch O2

Holley 550-903 Terminator X LS1/LS6 MPFI Kit

Holley 550-905 Terminator X LS2/LS3 MPFI Kit

Holley 550-910 Terminator X 58X/4X EV1 LS MPFI Kit

Holley 550-945 Terminator X Max Ford MPFI Kit

Holley 550-917 Terminator X Max Early Truck Engine MPFI Kit

Holley 550-919 Terminator X Max 24X/1X EV6 LS MPFI Trans Control

Holley 550-928 Terminator X Max LS2/LS3 MPFI Kit

Holley 550-931 Terminator X Max LS2/LS3 MPFI Kit

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

Holley 550-934 Terminator X Max 24X/1X EV6 LS MPFI Kit, DBW

Holley 550-937 Terminator X Ford MPFI Kit

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

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

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

Holley 550-1211 Terminator X, 2011-2012 Ford Coyote Ti-VCT, EV6

Holley 550-1212 Terminator X, 2013-2015 Ford Coyote Ti-VCT, EV1

Holley 550-1214 Terminator X, 2015.5-17 Ford Coyote Ti-VCT, EV1

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

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

Holley 550-1317 Terminator X Max, Ford Modular 2V, EV6 Injectors

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

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

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

Holley 550-1413 Terminator X Max, 15.5-17 Coyote Ti-VCT, EV6, DBW

Holley 550-903T Terminator X LS1 MPFI Kit

Holley 550-905T Terminator X 58X/4X EV6 LS MPFI Kit

Holley 550-909T Terminator X 24X/1X EV1 LS MPFI Kit

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