Holley EFI Terminator X Universal MPFI Kit
Type: EFI System

Take control of your engine with Terminator X. Don't settle for a factory 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 V8 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 Domestic V8 engine control, such as conventional push rod Chevrolet and Chrysler engines
- Includes EV1 Injector Harness
- High Impedance Injector Drivers will safely power most Stock injectors, and Holley EFI Injectors. Injector support chart provided in the instructions (Will not control Low Impedance Injectors)
- Bosch LSU 4.9 wideband to relay AFR information to the ECU for accurate reading and precise tuning control
- Built in 1bar MAP Sensor with vacuum hose adapters included (1/8th β ΒΌ and 3/16ths)
- Boosted applications, you can disable the internal MAP sensor and utilize an external MAP sensor, harness comes with the connector terminated, allowing for easy installation
- MAP Sensor vacuum hose adapters (1/8th β ΒΌ and 3/16ths)
- Plug and plug ignition capability with Dual Sync and HyperSpark Distributors, adapter 558-323 required for HyperSpark Distributors
- 4 Inputs β 12v, Ground, 5v, and Frequency for things such as additional pressure sensors, activation triggers for nitrous activation, or a trans brake
- Boost Control β Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, Boost Safeties
- Nitrous Control β Single Channel of Wet or Dry, Progressive or Non-Progressive, Rich/Lean Safeties, and target Closed Loop AFR
- Advanced Tables β 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
- On-Board Diagnostic LEDS for: ECU Power β Engine Run β Wideband Status β TPS Calibration β Crank Signal βCam Signal. Allows you to identify any Critical engine issues at a glance
- The included 3.5" Touchscreen Handheld contains a calibration wizard, that allows you to quickly build a base tune for any domestic V8 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 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
Specs:
- Accelerometer Support: Yes
- Boost Control: Yes
- Brand: Holley EFI
- CAN-BUS Support: Yes
- Category: Air and Fuel Delivery
- Coil Per Cylinder Ignition Support: Yes
- Datalogging Support: Yes
- Distributor Included: No
- Dry Nitrous Control: Yes
- e85 Support: Yes
- EGT Support: Yes
- Emission Code: 3
- 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
- Idle Air Control Motor Included: No
- Ignition Timing Control: Yes
- Ignition Type: Universal
- Individual Cylinder Fuel Corrections: Yes
- Injector Connector: Jetronic/Minitimer (Bosch EV1)
- 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
- Self-Tuning: Yes
- Sub Category: Fuel Injection System and Related Components
- Throttle Position Sensor Included: No
- Transmission: None
- User-Tuneable: Yes
- Wet Nitrous Control: Yes
Tech Resources:
Terminator X ECU's are designed to be mounted with the LED's facing up.
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Important Notices
- OffβRoad Use Only
Products sold by JS Speed are intended for offβroad use and may be illegal on public roads where emissions or pollutionβcontrol laws apply. - Check Local Laws
Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area. - Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicleβs factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.





