G-Body Engine Control Modules

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124 products

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$269 Off

Holley |

#4255501508

Holley 550-1508 Terminator X Max, 11-12 Coyote Ti-VCT, EV6, DBW

Ignition Type:

Ford Coyote

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$3,499.95

/kit

$3,768.95

$269 Off

Holley |

#4255501512

Holley 550-1512 Terminator X Max, 15.5-17 Coyote Ti-VCT, EV6, DBW

Ignition Type:

Ford Coyote

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$3,499.95

/kit

$3,768.95

-7%

Holley |

#425554143

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

Transmission Control:

Sold in Quantity:

Each

$659.95

/each

$714.95

$242 Off

Holley |

#425550602N

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

Ignition Type:

Factory GM

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

USB/CAN Tuning Cable

$3,099.95

/each

$3,341.95

$275 Off

Holley |

#4255501631LSD

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

Ignition Type:

Factory GM

Tuner Style:

Touchscreen Handheld

Throttle Style:

Drive-By-Wire

$3,549.95

/kit

$3,824.95

New Product Spotlight - 4th Quarter 2025 - Parts to Fuel Your Passion

Speedway Motors, a manufacturer, retailer and distributor of high-quality automotive parts and racing products, announced today new products now available on their website.

Replacing a G-Body 7.5" Bolt Rear End

Learn about the power behind the G-body platform and the steps to upgrade a 7.5" bolt rear end to a 8.5" to withstand high horsepower. See how to change the differential fluid and install new gaskets.

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.

G-Comp™ Buyer's Guide

Here's a handy guide to familiarize you with our G-Comp line of performance suspension systems.

G-Comp Front Suspension for 70-81 Camaro

Step by step guide to the installation of the G-Comp front suspension.

G-Comp Front Suspension for 67-69 Camaro

Step by Step instructions for the G-Comp front suspension install for a 67-69 Chevy Camaro.

G-Comp Front Suspension for 62-67 Nova

Step by Step guide to installing a G-Comp front suspension on your Nova.

Project Chevelle: Spindles and Control Arms Tech Article

Project Chevelle undergoes front suspension upgrades to minimize feeling every dip and bump in the road. Josh S. walks through the install and quick overview of the tubular control arms and G comp spindles.

Twin Turbo LS-Powered G-Comp Cobra

This Cobra features a G-Comp suspension and an unlikely engine choice, but its mission is the same as those storied Cobras of old. It was built to win races.

G-Comp Rear Suspension 70-81 Camaro

Easy to follow instructions to install a G-Comp rear suspension kit.

$188 Off

Holley |

#4255501319

Holley 550-1319 Terminator X Max, Ford Modular 4V, EV6 Injectors

Ignition Type:

Ford 4V Mod Stock Coils

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$2,399.95

/kit

$2,587.95

$188 Off

Holley |

#4255501420

Holley 550-1420 Terminator X Max, 2003-06 Gen III Hemi, EV1

Ignition Type:

Gen III Hemi Coil-on-Plug

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

Touchscreen Handheld

$2,399.95

/kit

$2,587.95

$144 Off

Holley |

#4255501219

Holley 550-1219 Terminator X, Ford Modular 4V, EV6 Injectors

Ignition Type:

Ford 4V Mod Stock Coils

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$2,049.95

/kit

$2,193.95

$244 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

$3,299.95

/kit

$3,543.95

$269 Off

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

$3,499.95

/kit

$3,768.95

$275 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

$3,549.95

/kit

$3,824.95

$269 Off

Holley |

#4255501315

Holley 550-1315 Terminator X Max, 15.5-17 Coyote Ti-VCT EV6 4R70W

Ignition Type:

Ford Coyote

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$3,499.95

/kit

$3,768.95

$269 Off

Holley |

#4255501312

Holley 550-1312 Terminator X Max, 13-15 Coyote Ti-VCT, EV1, 4R70W

Ignition Type:

Ford Coyote

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

Touchscreen Handheld

$3,499.95

/kit

$3,768.95

$187 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

$2,749.95

/kit

$2,936.95

$248 Off

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

$3,149.95

/kit

$3,397.95

$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

$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

$229 Off

Holley |

#425550606N

Holley 550-606N HP EFI ECU & Harness Kit, Ford V8 MPFI, NTK O2

Ignition Type:

Ford TFI

Injector Connector:

Jetronic / Minitimer (EV1)

Sold in Quantity:

Kit

$2,999.95

/each

$3,228.95

$269 Off

Holley |

#4255501411

Holley 550-1411 Terminator X Max, 13-15 Coyote Ti-VCT, EV6, DBW

Ignition Type:

Ford Coyote

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$3,499.95

/kit

$3,768.95

$248 Off

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

$3,149.95

/kit

$3,397.95

$248 Off

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

$3,149.95

/kit

$3,397.95

$269 Off

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

$3,499.95

/kit

$3,768.95

$269 Off

Holley |

#4255501510

Holley 550-1510 Terminator X Max, 13-15 Coyote Ti-VCT, EV6, DBW

Ignition Type:

Ford Coyote

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$3,499.95

/kit

$3,768.95

-6%

Holley |

#4255581270

Holley 558-127 EFI Benchtop Harness, Firmware, Dash, ECU Testing

GTIN Code:

090127136768

Sold in Quantity:

Each

$249.95

/kit

$266.95

$248 Off

Holley |

#4255501210

Holley 550-1210 Terminator X, 2011-2012 Ford Coyote Ti-VCT, EV1

Ignition Type:

Ford Coyote

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

Touchscreen Handheld

$3,149.95

/kit

$3,397.95

$248 Off

Holley |

#4255501213

Holley 550-1213 Terminator X, 2013-2015 Ford Coyote Ti-VCT, EV6

Ignition Type:

Ford Coyote

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$3,149.95

/kit

$3,397.95

$248 Off

Holley |

#4255501215

Holley 550-1215 Terminator X, 2015.5-17 Ford Coyote Ti-VCT, EV6

Ignition Type:

Ford Coyote

Injector Connector:

USCAR (EV6)

Tuner Style:

Touchscreen Handheld

$3,149.95

/kit

$3,397.95

$188 Off

Holley |

#4255501422

Holley 550-1422 Terminator X Max, 2007-12 Gen III Hemi, EV1

Ignition Type:

Gen III Hemi Coil-on-Plug

Injector Connector:

Jetronic / Minitimer (EV1)

Tuner Style:

Touchscreen Handheld

$2,399.95

/kit

$2,587.95

FiTech |

#521300031

FiTech 30003-1 Replacement ECU for Fitech 30003 Go Street EFI

(1)

$271.00

/each

FiTech |

#521300041

FiTech 30004-1 Replacement ECU for 30004 Go EFI Power Adder

GTIN Code:

812061031202

$271.00

/each

FiTech |

#521396101

FiTech 39610-1 Replacement ECU For Fitech 39610 Tri Power System

GTIN Code:

812061031455

$264.00

/each

FiTech |

#521300201

FiTech 30020-1 Replacement ECU for Fitech 30020 Go EFI Classic

GTIN Code:

812061031257

$271.00

/each

FiTech |

#521300641

FiTech 30064-1 Replacement ECU for 30064 Go EFI 2X4 Power Adder

GTIN Code:

812061031288

$271.00

/each

FiTech |

#521230064

FiTech 62013-30064 Handheld For 30064 Go EFI 2X4 Power Adder

GTIN Code:

812061032872

Sold in Quantity:

Each

$167.00

/each

FiTech |

#521300021

FiTech 30002-1 Replacement ECU for Fitech 30002 Handheld Go EFI 4

GTIN Code:

812061031189

$271.00

/each

FiTech |

#521300611

FiTech 30061-1 Replacement ECU for Fitech 30061 Go EFI 2X4

GTIN Code:

812061031264

$271.00

/each

Showing 1 - 108 of 124 results

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G-Body Engine Control Modules

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Products

Holley 550-1508 Terminator X Max, 11-12 Coyote Ti-VCT, EV6, DBW

Holley 550-1512 Terminator X Max, 15.5-17 Coyote Ti-VCT, EV6, DBW

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

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

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

Related Articles

Holley 550-1319 Terminator X Max, Ford Modular 4V, EV6 Injectors

Holley 550-1420 Terminator X Max, 2003-06 Gen III Hemi, EV1

Holley 550-1219 Terminator X, Ford Modular 4V, EV6 Injectors

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

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

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

Holley 550-1315 Terminator X Max, 15.5-17 Coyote Ti-VCT EV6 4R70W

Holley 550-1312 Terminator X Max, 13-15 Coyote Ti-VCT, EV1, 4R70W

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

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

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

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

Holley 550-606N HP EFI ECU & Harness Kit, Ford V8 MPFI, NTK O2

Holley 550-1411 Terminator X Max, 13-15 Coyote Ti-VCT, EV6, DBW

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

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

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

Holley 550-1510 Terminator X Max, 13-15 Coyote Ti-VCT, EV6, DBW

Holley 558-127 EFI Benchtop Harness, Firmware, Dash, ECU Testing

Holley 550-1210 Terminator X, 2011-2012 Ford Coyote Ti-VCT, EV1

Holley 550-1213 Terminator X, 2013-2015 Ford Coyote Ti-VCT, EV6

Holley 550-1215 Terminator X, 2015.5-17 Ford Coyote Ti-VCT, EV6

Holley 550-1422 Terminator X Max, 2007-12 Gen III Hemi, EV1

FiTech 30003-1 Replacement ECU for Fitech 30003 Go Street EFI

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FiTech 39610-1 Replacement ECU For Fitech 39610 Tri Power System

FiTech 30020-1 Replacement ECU for Fitech 30020 Go EFI Classic

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FiTech 30002-1 Replacement ECU for Fitech 30002 Handheld Go EFI 4

FiTech 30061-1 Replacement ECU for Fitech 30061 Go EFI 2X4

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