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 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:
- Eight High-Impedance Injector Drivers
- Configuration, monitoring and data logging via included 3.5-inch touchscreen LCD display
- Configuration and monitoring via Terminator PC software (free download) and optional CAN-to-USB adapter cable
- Four configurable inputs and outputs
- Boost Control*
- Single-Stage Progressive Nitrous Control*
- Staging Assist*
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 the Terminator X ECU. This ECU includes 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 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 Dodge Gen 3 Hemi Engine
Holley provides many features unique to the Dodge Gen 3 Hemi 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 factory Ignition Coils
- Choose from EV1 or EV6 injector harness
Choose From Four Different Versions of the Terminator X MPFI Kit for Dodge Gen 3 Hemi Engine
|550-1222||Dodge||Gen3 Hemi Engine 03-06||X||EV1||No||No|
|550-1223||Dodge||Gen3 Hemi Engine 03-06||X||EV6||No||No|
|550-1224||Dodge||Gen3 Hemi Engine 07-13+||X||EV1||No||No|
|550-1225||Dodge||Gen3 Hemi Engine 07-13+||X||EV6||No||No|
|550-1420||Dodge||Gen3 Hemi Engine 03-06||X Max||EV1||No||Yes|
|550-1421||Dodge||Gen3 Hemi Engine 03-06||X Max||EV6||No||Yes|
|550-1422||Dodge||Gen3 Hemi Engine 07-12||X Max||EV1||No||Yes|
|550-1423||Dodge||Gen3 Hemi Engine 07-12||X Max||EV6||No||Yes|
|550-1424||Dodge||Gen3 Hemi Engine 13+||X Max||EV1||No||Yes|
|550-1425||Dodge||Gen3 Hemi Engine 13+||X Max||EV6||No||Yes|
But Wait--There's More!
No, we're not going to send you a set of Ginsu knives with your Terminator X for Gen III Hemi. But if you have an '09 or later Gen III Hemi you definitely need to add VVT Control. There are two harness options for this: The 558-131 VVT Harness (for aftermarket intake manifolds) or the 558-132 VVT and SRV harness (for factory manifolds that feature the Short Runner Valve) for impressive low-RPM torque gains. For more information, including product video, or to order ala carte, check out this Gen III Hemi VVT Harness Product Page.
Or maybe you have the Chyrsler 46RE electroic transmission ('96-'03) and need a controller. Then you will absolutely want to opt for the Terminator X-Max and add the 558-473 Chrysler 46RE Transmission Control Harness. Why outsource this to an external controller when you can put fuel injection, ignition, transmission control, and more into the same system? Note that to use this you will have to opt for one of the 550-1420 through 550-1425 systems that include the Terminator X-Max ECU (does not work on the standard Terminator X ECU, PNs 550-1222 through 550-1225.) For more information, or to order ala carte, check out this 46RE Transmission Harness Product Page.
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.
- Fuel Pressure Gauge or
- Fuel Pressure Transducer
- CAN-to-USB Adapter Harness (for laptop tuning. Download Terminator X Software here.)
- CAN Bus Y-Cable
Important Note about Coil Harnesses in 2006
Dodge changed the coils they used in the middle of the 2006 production year. Holley ships the early coil harness (558-310) in their Terminator X kits for the 03-06 Hemi but if you have a Hemi engine that was built in 2006 there is a chance you need the late coil harness (558-311). Fortunately, this is easy to determine. Look at the image in the gallery above that compares the early and late coils. If you have an '06 and need the late coil harness simply let us know when ordering and we'll make the swap on our end before shipping. This will avoid delays later that will require the return of the early coil harness and the shipping of the late one.
Not Sure? Review this product documentation before you buy!
Holley Terminator X and X Max EFI Systems
Holley Terminator X and X Max EFI Systems
Holley Gen III HEMI Main Harness
(For use with for Holley Throttle Body)
|Boost Control||Yes (Requires Additional Hardware)|
|Fueling Strategy||Speed Density, Alpha-N, or Combination|
|Includes Power Harness||Yes|
|Injector Drivers||Eight High Impedance|
|Internal Datalogging||No. All datalogging done via external device (handheld, laptop, digital display.)|
|Nitrous Control||Yes (Requires Additional Hardware)|
|Number of Cylinders||Eight|
|User Configurable I/O||Yes|
|User-Selectable MAP Storage||No|
|Displays And Controllers|
|CAN Bus Capable||Yes (Specific to Holley ECUs Only)|
|Configurable||Monitor dozens of pre-configured metrics provided by the ECU, including sensors, air/fuel ratio, switched outputs, and more.|
|Functions||Setup, Monitor, Tuning|
|Gauge/Display Size||3.5 Inch Rectangular|
|Internal Storage||Yes (SD Card)|
|Harness Type||Power Harness, Main Harness, Injector Sub-Harness, I/O Harness, Ignition Adapter, DBW Harness (DBW Versions Only)|
|Sensor Harness Included||Direct-Fit Connector to Factory Crank Timing Pickup|
|Type||ECU-mounted 1 BAR MAP, Wideband O2|
|Also Included||I/O Harness|
|Application||Dodge Gen 3 Hemi Engine 03-06 or Dodge Gen 3 Hemi Engine 07-13+|
|Emission Code||3 - This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.|
|Unit of Sale||Kit|