

Hero image 0 of Holley EFI 550-904T Terminator X 24x/1x Multec 2 LS MPFI Kit - Without 3.5" Handheld, 0 of 10
Holley EFI 550-904T Terminator X 24x/1x Multec 2 LS MPFI Kit - Without 3.5" Handheld
(No ratings yet)
Check if this fits your vehicle
Key item features
- Engine Compatibility: Designed for GM LS engines with 24x crank reluctor and Multec 2 injectors, specifically supporting 4.8/5.3/6.0 truck engines.
- Tuning Capabilities: Features real-time fuel map learning, an integrated 1bar MAP sensor, and includes a CAN/USB tuning cable for laptop-based configuration and real-time engine tuning.
- Injector Support: Equipped with high impedance injector drivers capable of safely powering most stock LS and Holley EFI injectors, but not low impedance injectors.
- Advanced Controls: Offers 4 programmable outputs for accessories like fans and boost control, and 4 inputs for additional sensors or activation triggers.
- Integrated Safeties: Includes comprehensive boost control (vs. time, gear, RPM, speed) with safeties, and single-channel nitrous control with rich/lean safeties and closed-loop AFR targeting.
- Diagnostic Features: On-board diagnostic LEDs provide immediate visual status for ECU power, engine run, wideband, TPS calibration, and crank/cam signals.
- Expandable System: Plug-and-play compatible with various Holley EFI accessories, including analog gauges, shift lights, and future 12.3" digital dash support.
Generated by AI
Specs
- Compatible cars4.8,5.3,6.0 TRUCK ENGINES
- Vehicle makeGM
- Vehicle modelLS
- BrandHolley EFI
- Automotive parts divisionPerformance
- Vehicle fitment typeSpecific
Current price is USD$1,399.95
Price when purchased online
- Free shipping
Free 90-day returns
How do you want your item?
Plus, get 50% off an annual plan at checkout!
Ships to
Arrives by Wed, Jul 8
Sold and shipped by Walmart.com
Free 90-day returns
This item is gift eligible
More seller options (1)
Starting from $1,659.99
Hurry —get 50% off a year of Walmart+
Exclusions, T&C apply. Ends 7/5. Claim offer
About this item
Product details
GM LS 24x Crank, 1x Cam - 4.8/5.3/6.0 Truck Engines - Multec 2 Injector Harness , USB/CAN Tuning Cable;
Take control of your LS engine with Terminator X! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley EFI at a budget-friendly price!
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 NOS control, and much more. Terminator X comes fully loaded with base maps for common LS engine combinations to get you out of the garage and on the road/track fast. These Terminator X kits include a USB/CAN tuning cable instead of the 3.5 in. Handheld LCD, these kits require the use of the free Terminator X Software for initial setup. The Terminator X Software includes multiple base calibrations to choose from for either naturally aspirated or boosted engines. 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!;
Take control of your LS engine with Terminator X! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine, self-learning fuel strategies and the proven, race-winning technology of Holley EFI at a budget-friendly price!
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 NOS control, and much more. Terminator X comes fully loaded with base maps for common LS engine combinations to get you out of the garage and on the road/track fast. These Terminator X kits include a USB/CAN tuning cable instead of the 3.5 in. Handheld LCD, these kits require the use of the free Terminator X Software for initial setup. The Terminator X Software includes multiple base calibrations to choose from for either naturally aspirated or boosted engines. 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!;
- For GM LS Engines with 24x crank reluctor and Multec 2 Injectors
- Real-Time fuel map learn, takes the guess work out of tuning your base fuel table.
- High Impedance Injector Drivers will safely power most Stock LS injectors, and Holley EFI Injectors. Injector support chart provided in the instructions (Will not control Low Impedance Injectors)
- All of the new Terminator X systems utilize the Bosch LSU 4.9 wideband to relay AFR information to the ECU for accurate reading and precise tuning control.
- MAP Sensor vacuum hose adapters (1/8th â€" Â1/4 and 3/16ths)
- 4 Outputs â€" Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and More
- 4 Inputs â€" 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake
- Boost Control â€" Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, Boost Safeties
- Nitrous Control â€" Single Channel of Wet or Dry, Progressive or Non-Progressive, Rich/Lean Safeties, and target Closed Loop AFR
- On-Board Diagnostic LEDS for: ECU Power â€" Engine Run â€" Wideband Status â€" TPS Calibration â€" Crank Signal â€"Cam Signal. Allow you to identify any Critical engine issues at a glance
- Advanced Tables â€" 4x 1D Tables, 1x 1D per Gear Table, 4x 2D Tables, 1x 2D per Gear Table, can be used for any custom tables you can dream up, such as Flex Fuel Sensor Offset Table, or a custom fuel or oil pressure safety!
- Includes CAN/USB tuning cable allowing you to configure your ECU and Tuning the engine in real time.
- The compact ECU size allows you to mount it virtually anywhere. Remember, diagnostic LEDS must face up!
- Plug and play compatible with more Holley EFI accessories such as; analog style gauges, shift lights, various modules, and coming soon, 12.3" digital dash support!
- Free EFI Tuning Software for complete control of your Terminator X power plant
- Includes: 24x LS Engine Main Harness - Multec 2 Injector Harness - Terminator X ECU - ECU Main Power Harness - Bosch LSU 4.9 Wideband Oxygen Sensor - Input/Output Harness - and assorted vacuum adapters.
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it. Â
Specifications
Compatible cars
4.8,5.3,6.0 TRUCK ENGINES
Vehicle make
GM
Vehicle model
LS
Fuel injection accessory & part type
Terminator X ECU, 24x LS Engine Main Harness, Multec 2 Injector Harness, Input/Output Harness, Bosch LSU 4.9 Wideband Oxygen Sensor
Warranty
Warranty information
30-Day Warranty
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Warranty url
Warnings
Warning Text
California Proposition 65
Similar items you might like
Based on what customers bought
Mechanical Fuel Pump for 1997-2002 Yamaha Mountain Max 600/700, 2004-2006 Yamaha SX Venom & More - OEM Replacement for 8CH-24410-00-00, HFP-263 | QFS $119.98
Sponsored$11998current price $119.98Mechanical Fuel Pump for 1997-2002 Yamaha Mountain Max 600/700, 2004-2006 Yamaha SX Venom & More - OEM Replacement for 8CH-24410-00-00, HFP-263 | QFS
Shipping, arrives in 3+ daysClearance NURATIT Fuel Pump Assembly for Yamaha YFZ450R 2009-2014 - 2024 YFZ450X 2010-2011 Replace 18P-13907-12-00 Pump Fuel for YFZ 450R YFZ 450X YFZ 450 R YFZ 450 X $109.99 Was $129.99
Clearance
SponsoredNow$10999current price Now $109.99, Was $129.99$129.99You save $20.00You save$20.00NURATIT Fuel Pump Assembly for Yamaha YFZ450R 2009-2014 - 2024 YFZ450X 2010-2011 Replace 18P-13907-12-00 Pump Fuel for YFZ 450R YFZ 450X YFZ 450 R YFZ 450 X
Shipping, arrives in 3+ daysHolley EFI 550-905T Terminator X 58x/4x EV6 LS MPFI Kit - Without 3.5" Handheld $1,399.95
$1,39995current price $1,399.95Holley EFI 550-905T Terminator X 58x/4x EV6 LS MPFI Kit - Without 3.5" Handheld
null2 out of 5 Stars. null reviewsHolley EFI 550-937 Terminator X Ford MPFI Kit $1,499.95
$1,49995current price $1,499.95Holley EFI 550-937 Terminator X Ford MPFI Kit
15 out of 5 Stars. 1 reviewsHolley EFI 550-930T Terminator X Max MPFI System $1,949.95
$1,94995current price $1,949.95Holley EFI 550-930T Terminator X Max MPFI System
Holley EFI 550-909T Terminator X 24x/1x EV1 LS MPFI Kit - Without 3.5" Handheld $1,399.95
$1,39995current price $1,399.95Holley EFI 550-909T Terminator X 24x/1x EV1 LS MPFI Kit - Without 3.5" Handheld
Holley EFI 503-5 Fuel Injection Throttle Body Injection Kit $112.95
$11295current price $112.95Holley EFI 503-5 Fuel Injection Throttle Body Injection Kit
15 out of 5 Stars. 1 reviewsHolley EFI 550-903T Terminator X 24x/1x EV1 LS MPFI Kit - Without 3.5" Handheld $1,449.95
$1,44995current price $1,449.95Holley EFI 550-903T Terminator X 24x/1x EV1 LS MPFI Kit - Without 3.5" Handheld
Holley EFI 558-203 Fuel Injection Harness $217.95
$21795current price $217.95Holley EFI 558-203 Fuel Injection Harness
Holley EFI 558-405 Fuel Injection Harness $306.95
$30695current price $306.95Holley EFI 558-405 Fuel Injection Harness
Electric Fuel Pump EFI for Yamaha 150-250 hp 1999-2001, 65L-13907-00-00,66K-13907-00-00,67H-13907-00-0,8090,18-7341 by FASWORX $69.86
$6986current price $69.86Electric Fuel Pump EFI for Yamaha 150-250 hp 1999-2001, 65L-13907-00-00,66K-13907-00-00,67H-13907-00-0,8090,18-7341 by FASWORX
Holley EFI 558-504 Fuel Injection Harness $870.95
$87095current price $870.95Holley EFI 558-504 Fuel Injection Harness
Holley EFI 550-910T Terminator X 58x/4x EV1 LS MPFI Kit - Without 3.5" Handheld $1,399.95
$1,39995current price $1,399.95Holley EFI 550-910T Terminator X 58x/4x EV1 LS MPFI Kit - Without 3.5" Handheld
Holley EFI 550-916T Terminator X Max 24x/1x EV1 LS MPFI Kit with Transmission Control - Without 3.5" Handheld $2,182.33
$2,18233current price $2,182.33Holley EFI 550-916T Terminator X Max 24x/1x EV1 LS MPFI Kit with Transmission Control - Without 3.5" Handheld
Aeromotive 13113 Ultra-High Flow Adjustable Efi Regulator $350.52 Was $395.28
$35052current price $350.52, Was $395.28$395.28Aeromotive 13113 Ultra-High Flow Adjustable Efi Regulator
Holley EFI 558-108 Fuel Injection Harness $819.95
$81995current price $819.95Holley EFI 558-108 Fuel Injection Harness
Holley EFI 558-439 Fuel Injection Harness $265.95
$26595current price $265.95Holley EFI 558-439 Fuel Injection Harness
Holley EFI 558-214 Fuel Injection Harness $280.95
$28095current price $280.95Holley EFI 558-214 Fuel Injection Harness
Edelbrock EFI Fuel Rail Kit - BBC Pro Flo XT $230.95
$23095current price $230.95Edelbrock EFI Fuel Rail Kit - BBC Pro Flo XT
Holley EFI 558-502 Fuel Injection Harness $972.95
$97295current price $972.95Holley EFI 558-502 Fuel Injection Harness
Customer ratings & reviews
0 ratings|0 reviews
This item does not have any reviews yet
Related pages
- Mercury Mystique Air Intake Kit
- Edelbrock ATV Accessories
- Holley Hp 750
- Mercury Cougar Air Intake Kit
- Holley Fuel Pressure Regulator Rebuild Kit
- Holley Additional Auto Replacement Parts
- Intake Couplings
- Fuel Rails
- Performance Fuel Pumps
- Carburetor Accelerator Pumps and Parts
- Performance Fuel Injection
- Performance Fuel Regulators
