Products to Compare (max of 3)
Compare These Parts
Talk to the Experts. Call 800.979.0122, 7am-10pm, everyday.
Since 1952
Talk to the Experts. Call 800.979.0122
Shop By
Street Race Truck More... The Toolbox
Add to Cart
Holley 550-1424 Terminator X Max, 2013-Up Gen III Hemi, EV1
Holley 550-1424 Terminator X Max, 2013-Up Gen III Hemi, EV1

Holley 550-1424 Terminator X Max, 2013-Up Gen III Hemi, EV1

5.7 Chrysler Hemi V8, 6.1 Chrysler Hemi V8, 6.4 Chrysler Hemi V8, Drive-By-Wire Throttle Style

0 Reviews | 0 Answered Questions
Factory Shipped
Ships FREE
Store Pickup Availability
Lincoln, NE -
Phoenix, AZ -
Select your vehicle to verify fitment.
Select Vehicle
Holley 550-1424 Terminator X Max, 2013-Up Gen III Hemi, EV1
Holley 550-1424 Terminator X Max, 2013-Up Gen III Hemi, EV1
Holley 550-1424 Terminator X Max, 2013-Up Gen III Hemi, EV1
Holley 550-1424 Terminator X Max, 2013-Up Gen III Hemi, EV1
Zoomed In Image
We estimate this item will ship on or before February 1st.
Part # 4255501424
Save 10%
Call to Order
Add to Buildlist
Videos & Articles


Ignition Type:
Gen III Hemi Coil-on-Plug
Injector Connector:
Jetronic / Minitimer (EV1)
MAP Sensor Included:
Tuner Style:
Touchscreen Handheld
Transmission Control:
Throttle Style:
Oxygen Sensor Style:
MFG. Part #:
GTIN Code:
Sold in Quantity:


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 EFIs 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 wont break the bank!


    • Plug and play Chrysler GEN III Hemi control - 2013 and up 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 Holley EFI accessories - Analog gauges, shift lights, modules, and both 6.86" and 12.3" Pro Dash
    • EV1 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", 1/4", 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 LEDs must face up!
    • FREE EFI Tuning software - For compete control of your Terminator X power plant
  • Application

    Fits 2013 and up GEN III HEMI engines with EV1 injectors, and a Drive-By-Wire throttle body.


    Instruction Sheet 1 (PDF)

    Instruction Sheet 2 (PDF)

    Important Messages

    • This item ships directly from the manufacturer. It may take an additional 2 business days for Holley to ship this item.
    • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
    • This item ships via Ground Shipping only. Expedited and Air shipping options are not available.
    Some parts are not legal for use in California or other states with similar laws/regulations

    Related Products

    More Like This


    Q & A

    Videos & Articles

    You May Also Like