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Holley EFI Terminator X Max - 2003-2006 Gen III HEMI

Part # 550-1421

EV6 Injectors - Drive-by-Wire Throttle Body Control

Drive-By-Wire

Injector Connector

Year Range

Holley EFI Terminator X Max - 2003-2006 Gen III HEMI

Estimated Ship Date: 07/31/2025
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3

Emissions

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.

See Emissions Details
Introducing Terminator X and X Max Kits for Chrysler GEN III HEMI engines from 2003-2013+ such as the 5.7L, 6.1L and 6.4L engines with the factory Drive-by-Wire throttle body. (Non-VVT only) Terminator X features real-time fuel learn, high impedance injector drivers, an integrated 1bar MAP sensor, and 4 programmable inputs and outputs. The inputs and outputs are ideal for electric fans, boost control solenoids, progressive nitrous control, and much more. Terminator X comes fully loaded with base maps for common HEMI engine combinations to get you out of the garage and on the road/track fast. The 3.5" touch screen LCD handheld contains an easy to use calibration wizard as well as tuning and gauge display functions. Also included is Holley EFI's industry-leading, easy to use software suite that allows full laptop access for advanced users. Whether you are building a budget beater or a boosted race car, Terminator X has the features and technology you need at a price that won't break the bank!

Features:

  • Plug and play Chrysler GEN III Hemi control - 2003-2006 Engines such as the 5.7L, 6.1L and 6.4L engines utilizing the factory DBW (Drive by Wire) throttle body. (Non-VVT only)
  • Plug and play compatible with multiple Holley EFI accessories including our gauges, shift lights, various modules, and digital and pro dashes (Holley P/N's 553-106, 553-111, and 553-112)
  • EV6 injector harness included
  • High Impedance Injector drivers power Holley EFI and most stock injectors - Injector support chart found in instructions (will not support low impedance injectors)
  • Included Bosch LSU 4.9 wideband O2 sensors for accurate readings and precise tuning control
  • Built in 1bar MAP (manifold absolute pressure) sensor included - For Boosted applications – internal MAP sensor can be disabled and utilize external MAP sensor harness (kit includes a terminated connector for seamless installation)
  • Vacuum hose adapters included - (1/8”, ¼”, and 3/16” sizes)
  • 4 inputs – 12v, Ground, 5v, and frequency for items like pressure sensors, activation triggers, nitrous activation, or trans brake
  • Boost Control – boost vs. time, boost vs. gear, boost vs. RPM, boost vs. speed, and boost safeties
  • Nitrous Control – channels for wet or dry, progressive or non-progressive, rich/lean safeties, and target closed loop AFR (Air/Fuel Ratio)
  • Advanced Tables – (4x 1D tables, 1x 1D gear table, 4x 2D table, and 1x 2D gear tables) for nearly unlimited table configuration options
  • On-board diagnostic LEDS - ECU power, engine run, TPS calibration, cam signal, and more! Identify critical engine parameters at a glance
  • 3.5” touchscreen handheld included - Internal data-logging, custom gauge display, and calibration wizard allow quick building bases tunes for any Domestic V8 engine
  • Compact ECU (Engine Control Unit) – At only 7.45” x 4.1” x 1.66” the compact packaging allows mounting virtually anywhere. REMINDER: diagnostic LED’s must face up!
  • FREE EFI Tuning software – For compete control of your Terminator X power plant

About Holley EFI

Find standalone EFI for LS, Coyote, Hemi and more at Holley.com. From engine swapping to managing up to 4000 horsepower, we have a solution for every project!

Accelerometer SupportYes
Boost ControlYes
Brand Holley EFI
CAN-BUS SupportYes
CategoryAir and Fuel Delivery
Coil Per Cylinder Ignition SupportYes
Datalogging SupportYes
Distributor IncludedNo
Drive-By-WireYes
Dry Nitrous ControlYes
e85 SupportYes
EGT SupportYes
Emission Code3
EngineGen III Hemi
Forced Induction SupportYes
Fuel Filter IncludedNo
Fuel Hose IncludedNo
Fuel Injectors IncludedNo
Fuel Pressure Regulator IncludedNo
Fuel Pump IncludedNo
Grade TypePerformance
Handheld IncludedYes
Idle Air Control Motor IncludedNo
Ignition Timing ControlYes
Individual Cylinder Fuel CorrectionsYes
Injector ConnectorUSCAR (EV6)
Intake Manifold IncludedNo
Knock Retard SupportYes
Mounting Hardware IncludedNo
Multi-Stage Nitrous ControlYes
Part TypeFuel Injection System
Product TypeEFI System
Progressive Nitrous ControlYes
Self-TuningYes
Sub CategoryFuel Injection System and Related Components
Throttle Position Sensor IncludedNo
TransmissionNone
User-TuneableYes
Wet Nitrous ControlYes
Year Range2003-2006
UPC090127088067
Part Number550-1421
3

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.


The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle


WARNING: It is against the law to install this part on an Emissions Controlled Vehicle


The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle
ECU is not recommended for marine applications, but can be used on off-road applications as long as you choose a safe location, keep it dry, protect from heat, and ensure proper wiring management.

*Free Shipping and Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

Some parts are not legal for use in California or other states with similar regulations.