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-10% Terminator X MPFI Kit for Ford Coyote Engine 2015.5-2017

What's Terminator X?

Holley's Terminator X family of EFI Systems are standalone engine management systems that closely replicate some of Holley's most advanced engine management systems but at a much more budget-friendly price. This PDF gives a highly detailed comparison of the Terminator X and X Max to engines built using the Holley HP and Dominator ECUs. To summarize, Holley was able to leave out some features found to be less-necessary by the majority of users and, in doing do, slash the price of a full-featured EFI System by half.  If you're switching your carbureted engine to multi-point EFI or are swapping a fuel-injected engine into your ride and need to stay on a budget, this is the EFI system for you.

Here are some of the features that are included in each Terminator X kit:

  • *Requires hardware not included with Terminator X system to implement
  • **X Max Version Only

Different Terminator X EFI Systems For Different Applications

Yes, there are quite a few different Terminator X EFI System--nearly 100 with more on the way.  All Terminator X systems include either a Terminator X or Terminator X Max ECU. The Terminator X Max ECU provides connectivity for transmission control and drive-by-wire harnesses and is included only in those kits that require one or both of these features. Both ECUs include an on-board 1-BAR MAP sensor or you can add an external MAP sensor for boosted applications. On-Board Diagnostic LEDs display the status of ECU Power, Engine Run, Wideband Status, TPS Calibration, Crank Signal, and Cam Signal

In addition to the ECU the kit all Terminator X / X-Max systems include the following:

  • ECU Power Harness
  • Application-Specific Main Harness
  • 3.5-inch Touchscreen LCD Display with Setup Wizard app
  • Custom 4-input / 4-output harness pre-configured for two Electric Fans, A/C Kick, and A/C Shutdown
  • Bosch LSU 4.9 Wideband O2 Sensor

Unique To The Terminator X MPFI Kit for Ford Coyote Engine 2015.5-2017

Holley provides many features unique to the Ford 2015.5-2017 Coyote Engine that make this EFI system a breeze to install and configure and powerful to operate.

  • Direct-fit connectors for factory sensors
  • Ignition harness for factory ignition coils
  • Two Four-Channel Coil Driver Modules for Ford Ignition Coils
  • Transmission harness for Ford 4R70W and 4R75W transmissions from 1998 and up*
  • Drive-By-Wire harness for Ford Coyote throttle body**
  • Coyote T-VCT controller and harness
  • Choose from EV1 or EV6 injector harness
  • *Transmission Control Versions Only
  • **Drive-By-Wire Control Versions Only

Choose From Eight Different Versions of the Terminator X MPFI Kit for Ford Coyote Engine 2015.5-2017

Part NumberManuf.EngineECUInjector
550-1214Ford2015.5-2017 Coyote EngineXEV1NoNo
550-1215Ford2015.5-2017 Coyote EngineXEV6NoNo
550-1412Ford2015.5-2017 Coyote EngineX MaxEV1NoYes
550-1413Ford2015.5-2017 Coyote EngineX MaxEV6NoYes
550-1314Ford2015.5-2017 Coyote EngineX MaxEV1YesNo
550-1315Ford2015.5-2017 Coyote EngineX MaxEV6YesNo
550-1511Ford2015.5-2017 Coyote EngineX MaxEV1YesYes
550-1512Ford2015.5-2017 Coyote EngineX MaxEV6YesYes

What Else Will I Need?

Required:  EFI Fuel System with

  • EFI Fuel Pump (Many great options here)
  • Pre- and Post-Pump Filters
  • Fuel Pressure Regulator
  • Associated Hose, Hose Ends, Clamps, Adapters, Etc.


Not Sure? Review this product documentation before you buy!

Quickstart Manual
Holley Terminator X and X Max EFI Systems

Tuning Manual
Holley Terminator X and X Max EFI Systems

Boost ControlYes (Requires Additional Hardware)
DIS OutputsEight
FamilyTerminator X
Fueling StrategySpeed Density, Alpha-N, or Combination
Includes Power HarnessYes
Injector DriversEight High Impedance
Internal DataloggingNo. All datalogging done via external device (handheld, laptop, digital display.)
Nitrous ControlYes (Requires Additional Hardware)
Number of CylindersEight
User Configurable I/OYes
User-Selectable MAP StorageNo
Water-Methanol ControlNo
Displays And Controllers
Auto BrightnessNo
CAN Bus CapableYes (Specific to Holley ECUs Only)
Case/Bezel FinishBlack
ConfigurableMonitor dozens of pre-configured metrics provided by the ECU, including sensors, air/fuel ratio, switched outputs, drive-by-wire data, and more.
Data LoggingYes
Display TypeLCD
FunctionsSetup, Monitor, Tuning
Gauge/Display Size3.5 Inch Rectangular
Internal StorageYes (SD Card)
Harness TypePower Harness, Main Harness, Injector Sub-Harness, I/O Harness, Ignition Adapter. Transmission Harness (Transmission Control Versions Only), DBW Harness (DBW Versions Only)
Crank Timing
Sensor Harness IncludedDirect-Fit Connector to Factory Crank Timing Pickup
TypeECU-mounted 1 BAR MAP, Wideband O2
Also IncludedI/O Harness
ApplicationFord 2015.5-2017 Coyote Engine
Emission Code3 - This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.
Unit of SaleKit

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Terminator X MPFI Kit for Ford Coyote Engine 2015.5-2017

  • Views: 15077
  • Brand: Holley EFI
  • Product Code: 550-1214 | 550-1215 | 550-1314 | 550-1315 ...
  • Availability: In Stock
  • $2,968.00
  • $2,670.95

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