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Description
Holley Terminator X MAX Engine Management Systems 550-931TERMINATOR X MAX MPFI W DBW 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 inputs and
TERMINATOR X MAX MPFI W/DBW
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 inputs and outputs. The inputs and outputs are ideal for electric fans, boost control solenoids, progressive nitrous control, and much more. Part number 550-931 also has Drive-By Wire Throttle Body 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:
- Designed for GM 4.8/5.3/6.0 LS Truck Engines and LS2/LS3 with 58x Crank, 4x Cam and a Drive-By-Wire Throttle Body, 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.
- 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, 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
- Recommended Pedal part number - 10379038
- Includes: 58x/4x LS Engine Main Harness - EV6 Injector Harness - DBW Throttle Body 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 | 58x |
| Emission Code | 3 |
| Ignition Type | GM LS 58x |
| Injector Connector | USCAR (EV6) |
| Product Type | Terminator X Max LS MPFI |
| Terminator LS Options | Fuel, Spark, Drive-by-Wire |
| Part Number | 550-931 |
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
4.7 ★★★★★
Based on 1183 reviews
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Product Reviews
★★★★★ 5
Looks great. Holds ALOT!
Love it! Sturdy! Hold 3 soap dispensers.
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Reviewed in the United States on May 7, 2026
★★★★★ 4
Just right for the necessities!
Very sturdy and made of quality material. Some people may prefer an even larger version if they use more products but thisone fits perfectly on the ledge behind my sink and is just big enough for the products I use daily when cleaning the kitchen. My only complaint is that the drip tray is about ¼ of an inch too short lengthwise so if all your products get a little water on them, you may get some drippage on the counter but I just slid it to the far left side where the sponges go because that's where it's needed most. I installed it backwards because I can't remove the tray from the front due to the sinks edge being raised too high. I also installed the rag holder in the opposite direction so that I can fit taller/more products in the back, I just think it works better that way imo. Overall, I'm highly satisfied with this product.
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Reviewed in the United States on February 21, 2024
★★★★★ 5
Noah's Ark
It's the largest caddy I could find that is great. Compared with other product reviews: no assembly required, sturdy, scratch protected feet, no rusting, etc. I bought clear and black spray, foam and capped bottles for it and just love having all my natural cleaning products out, handy, coordinating and looking good. Add a splash of color with some nice kitchen sheers or dish cloth. I like that it's not broken into a lot of compartments, but rather mostly platform to mix and match lots of bottles onto. I do have a long handled brush, and the basket holds it beautifully without tipping. I also found a silicone draining mat I like the look of, and it fits Perfectly under the caddy in place of the clear/white tray it comes with. https://www.amazon.com/dp/B0BHQ9MRZQ?psc=1&ref=ppx_yo2ov_dt_b_product_details Since I see this caddy set up every day, I'm happy to have a quality product on display.
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Reviewed in the United States on January 29, 2024
★★★★★ 5
Great product.
This stand works perfectly for me! Ive bought a lot and they either rust or the tray leaks water or you have to let the built in metal tray run directly in to the sink, which doesn't work if the sink is raised even a little bit.
This stand holds multiple cleaning tools, sponge brushes etc, the drain plugs and I can hang my cleaning cloth to dry. It is perfect. The tray catches all the water drips and cleans easily. It is compact and makes my kitchen counter look neat.
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Reviewed in the United States on February 10, 2025
★★★★★ 5
Keeps you organized at the sink
It does the job and it keeps it organized by the sink
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Reviewed in the United States on April 5, 2026