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Ships within 48 hours · Estimated delivery Jul 11 - Jul 16
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Description
Holley Terminator X Engine Management Systems 550-909TERMINATOR X MPFI, LS1 W EV6 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.
TERMINATOR X MPFI, LS1 W/ EV6
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!
Features:
- For GM LS1/LS6 engines with 24x crank reluctor - with EV6 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.
- On-Board 1bar MAP sensor, is perfect for N/A or Nitrous engine combos. If your combination requires a 2+Bar, we recommend GM 12592525, and our adapter part number 558-416.
- MAP Sensor vacuum hose adapters (1/8th – ¼ and 3/16ths)
- 4 Inputs – 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or 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
- 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!
- On-Board Diagnostic LEDS for: ECU Power – Engine Run – Wideband Status – TPS Calibration – Crank Signal –Cam Signal. Allow 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 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 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 - EV6 Injector Harness - Terminator X ECU - ECU Main Power Harness - Bosch LSU 4.9 Wideband Oxygen Sensor - Input/Output Harness - and assorted vacuum adapters.
Specs
| Brand | Holley EFI |
|---|---|
| Crank Reluctor | 24x |
| Emission Code | 3 |
| Ignition Type | GM LS 24x |
| Injector Connector | USCAR (EV6) |
| Product Type | Terminator X LS MPFI |
| Terminator LS Options | Fuel, Spark |
| Part Number | 550-909 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
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Product Reviews
★★★★★ 4
Amazing!
Color: Mermaid
I bought this for my musical Seussical and for everyday use. I was very impressed by the quality it was so easy to put on and it washed right off. This is the perfect glitter! I tested it on my arm face and hair it and my 2 only problems are that the color is not what it looks in the picture I got the mermaid color thinking it would have more pink but it does not have much pink in it when you put it on it appears more blue and green. The other thing is for those who got this for their hair be ware the glitter will fall off I didn’t get to give it a great chance on my hair but I think it’s not terrible you just need to give it more time to dry than I did or whenever you move you’re head glitter will come off. Overall I think this is an amazing product and I am definitely considering trying other colors.
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Reviewed in the United States on March 1, 2025
★★★★★ 5
Pretty and easy to use/wash off
Color: Sparkling Pink
Pretttyyy! It washes off easily when you want it to, so there’s no worries with it feeling “permanent.” It does rub off too but with excessive rubbing. It’s a pretty color that’s holographic-like. We love it for sparkly cheeks!
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Reviewed in the United States on March 20, 2026
★★★★★ 5
Great Body Glitter
Color: Sparkling Pink
The main colors of this holo glitter are purple, blue, and silver. It worked perfectly for my outfit, and I honestly had no complaints. When it comes to glitter, there’s nothing you can do to prevent it from getting everywhere, so I don’t hold that against the product at all. It sheds like normal but this literally stayed on after I wore it all day/night at a concert while sweating in 90-100°F heat the whole time; it lasts great. It also washed off super easy with some warm water and soap, which was such a relief. The gel/liquid itself is incredibly easy to apply, as it is pretty thin and dries quickly (maybe 3-5 minutes for total dryness I think?). You have to shake the bottle a bit to get the glitter spread out, but it rolls on easily. It sparkles great as well.
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Reviewed in the United States on October 31, 2025
★★★★★ 3
Cheap body glitter if that is what you are looking for
Color: Laser Green
The container broke so be careful!!! Also, the glitter doesn’t really roll on that well and kept getting clumped into the sides of the roller. If you are looking for cheap body glitter this is it!! Otherwise, it lasts all day and washes off easily
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Reviewed in the United States on March 17, 2026
★★★★★ 5
They are worth the money!!
Size: Pack of 5
They are big and a nice treat for your dog!! My dog just loves them. I will continue to purchase!!
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Reviewed in the United States on May 26, 2026