Search for parts here
Press & drag to view
Holley EFIPart 550-904Made in US
Product Details
⚙️
Vehicle Fitment & Compatibility
View all 0 vehicle applications
Years
Make / Model
Submodel
Engine
1900
No applications match your search.
⭐
Key Features
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 nitrous 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. 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.
24x Crank - 1x Cam - Multec 2 Injectors - 3.5 in. Touchscreen
- 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 – ¼ and 3/16ths)
- 4 Outputs – Ground, PWM - for accessories such as fans, boost control, nitrous control, IAC Kit, and more
- 4 Inputs – 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, activation triggers for nitrous activation, or a trans brake
- Boost Control – Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, Boost Safeties
- Nitrous Control – 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 – Engine Run – Wideband Status – TPS Calibration – Crank Signal –Cam Signal. Allows you to identify any Critical engine issues at a glance
- Advanced Tables – 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
- The included 3.5" Touchscreen Handheld contains a calibration wizard, that allows you to quickly build a base tune for any LS engine. Additionally the handheld provides internal data-logging and a fully customizable gauge display
- The compact ECU size allows you to mount it virtually anywhere. Remember, diagnostic LEDS must face up
- 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)
- 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
📖
About this product
24x Crank - 1x Cam - Multec 2 Injectors - 3.5 in. Touchscreen
📋
Product Specifications
Accelerometer Support
Yes
Boost Control
Yes
Brand
Holley EFI
CAN-BUS Support
Yes
Category
Fuel Injection - EFI
Coil Per Cylinder Ignition Support
Yes
Color
Black
Country
US
Crank Reluctor
24x
Datalogging Support
Yes
Distributor Included
No
Drive-By-Wire
No
Dry Nitrous Control
Yes
e85 Support
Yes
EGT Support
Yes
Emission Code
3
Finish
Textured
Forced Induction Support
Yes
Fuel Filter Included
No
Fuel Hose Included
No
Fuel Injectors Included
No
Fuel Pressure Regulator Included
No
Fuel Pump Included
No
Grade Type
Performance
Handheld Included
Yes
HTS Code
8409915085
Idle Air Control Motor Included
No
Ignition Timing Control
Yes
Ignition Type
GM LS 24x
Individual Cylinder Fuel Corrections
Yes
Injector Connector
Multec 2
Intake Manifold Included
No
Knock Retard Support
Yes
MAP Sensor
1bar
Mounting Hardware Included
No
Multi-Stage Nitrous Control
Yes
Part Type
Fuel Injection System
Product Type
EFI System
Progressive Nitrous Control
Yes
Prop 65 Yes/No
No
Self-Tuning
Yes
Terminator LS Options
Fuel
Throttle Position Sensor Included
No
User-Tuneable
Yes
Warning
California Proposition 65
Warranty
Manufacturer's Limited 90 Day Warranty
Wet Nitrous Control
Yes
🛡️
Warranty & Compliance
Warranty
Manufacturer's Limited 90 Day Warranty
Country of Origin
US
Emissions Code
3
HS Code
8409915085
📐
Dimensions & Shipping
Product Dimensions
12.3 × 11.5 × 7.6 in
Shipping Dimensions
12.3 × 11.5 × 7.6 in
Weight
4094 g (4.09 kg)