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Description
Holley Terminator X MAX Engine Management Systems 550-919TERMINATOR X MAX MPFI W TRANS, LS1 W EV6 Take control of your LS engine with Terminator X Max! 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 Max features real time fuel learn, high impedance injector drivers, an integrated 1bar MAP sensor, and 4 programmable
TERMINATOR X MAX MPFI W/TRANS, LS1 W/EV6Take control of your LS engine with Terminator X Max! 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 Max 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. Part number 550-916 also has 4L60E or 4L80E Transmission control. Terminator X Max 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 MAX 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 and 4L60E/4L80E transmissions
- 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 Max 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
- 4 Outputs – Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and More
- 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 - 4L60E/4L80E Transmission Control Harness - Terminator X MAX 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 Max LS MPFI |
| Terminator LS Options | Fuel, Spark, Transmission |
| Part Number | 550-919 |
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
4.0 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 5
Easy to install and excellent quality!
Size: 6 tier, Color: Black Brush Silver, Size: 6 tier, Color: Black Brush Silver
We moved into our house a year ago and I couldn't figure out what to put in this space. We considered installing our own shelves but then I found this! It fit the space and looks great! You can see in the bottom of the picture we ended up removing the bottom shelf and the feet that came with it in order to account for the narrow space of the baseboard but it was a quick fix and still looks great. This is also the EASIEST piece of furniture I've ever installed. It took me 10 mins all by myself and then my husband drilled in the top part to the wall. Still have some decorating to do but we couldn't be happier. The wood is real and the other materials are good quality.
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Reviewed in the United States on May 13, 2021
★★★★★ 5
Love this shelf
Size: 6 tier, Color: Black Brush Silver, Size: 6 tier, Color: Black Brush Silver
Great quality easy assembly.hardwear included. Just beautiful
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Reviewed in the United States on August 23, 2025
★★★★★ 5
Awesome Shelf for a Great Price!
The shelf is very sturdy and built well. I did not expect the quality to be so good. I honestly don't think you could build one with parts from the hardware store for less money. It was not very difficult to assemble, but it would have been easier if the were unions used with the pipes. I had to turn the whole shelf to tighten it. I also added some lights and the wires were difficult to snake through the pipes but I had planned on that not being easy. I did need help hanging the shelf. I don't think it can be done without help. I am extremely happy with the product and have got several compliments. Now I have to buy one for my mom because she likes mine so much. Shipping was super fast, it got to my house 1 day before I expected it. Thanks, I will be buying another one as soon as it gets back in stock
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Reviewed in the United States on November 2, 2020
★★★★★ 4
Looks great, not super sturdy
Size: 6 tier, Color: Black Brush Silver, Size: 6 tier, Color: Black Brush Silver
Putting the shelf together was simple and it looks nice. The shelf is not super study though. Word of advice, DO NOT use the drywall anchors that come with the shelf; buy your own. The instructions say to use a 5/16 drill bit and the included anchors. The anchors are terrible; the 5/16 bit was too big and the anchors went right through the wall when we tried to put the screws in. It was a huge frustration to put eight holes in the wall that we then had to patch up and repaint over because the included materials are terrible. Luckily a couple of the screws line up with the studs so it's fairly sturdy, but use our own anchors.
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Reviewed in the United States on January 25, 2022
★★★★★ 5
So good I bought two
Size: 6 tier, Color: Black Brush Silver
These shelves are GREAT. Why? They arrive in a compact well protected package, they go up in minutes, are super tall, and they look fantastic. The price is perfect. The components are not 'real' iron pipes (I've built my own iron pipes shelves before and it's extremely heavy), but some kind of lighter weight metal. That's fine by me! The shelves appear to be real wood (!!). If you buy cheap furniture you know what fake wood looks like. You can tell. Guests can tell. This is probably a pretty cheap wood but who cares--it's REAL, is stained nicely with a distressed look, and overall looks amazing once books and items go on it.
If you are deciding between these and some cheaper similar thing, pay a biiiit more and get something with real wood. I just bought a second for my office and they'll hold my books, art, and speakers.
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Reviewed in the United States on May 28, 2021