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Description
EFI Terminator X Max - Gen IV 58x Crank - 4x Cam - EV6 Injectors - Transmission Control - 3.5 in. TouchscreenHolley EFI Terminator X Max Gen IV 4. 8 5. 3 6. 0 GM Truck Engines and LS2 LS3 24x Crank 1x Cam Multec 2 Injectors Transmission Control USB CAN Tuning Cable Overview 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!
Holley EFI Terminator X Max - Gen IV 4.8/5.3/6.0 GM Truck Engines and LS2/LS324x Crank - 1x Cam - Multec 2 Injectors - Transmission Control - USB/CAN Tuning Cable
Overview
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 550-917 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. These Terminator X kits include a USB/CAN tuning cable instead of the 3.5" Handheld LCD, these kits require the use of the free Terminator X Software for initial setup. The Terminator X Software includes multiple base calibrations to choose from for either naturally aspirated or boosted engines. 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!
Not recommended for 4x4 applications with electronic transfer cases. Not compatible with 4L6X transmissions from model year 1995 or before due to year-by-year changes in converter lockup and downshift strategy.
Features:
- Designed for GM LS 4.8/5.3/6.0 LS Truck Engines and LS2/LS3 with 58x Crank, 4x Cam and 4L60E/4L80E transmissions, and 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 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 ???? ?? 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: 58x/4x 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.
Details:
- Crank Reluctor: 58x
- Ignition Type: GM LS 58x
- Injector Connector: USCAR (EV6)
- Terminator LS Options: Fuel, Spark, Transmission
Links
Instruction Sheet
Instruction Sheet
Parts Guide
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
★★★★★ 5
Very handy to have to spot them easily
Color: Dark Blue
Love the cases, have a different color on each rooms tv. Hopefully it will protect from a drop as that is what prompted me to buy it. We cracked the screen on our last remote and they are expensive to replace. Good price
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Reviewed in the United States on May 15, 2026
★★★★★ 5
THESE TWO REMOTE CADDIES ARE FANTASTIC
Color: Beige, Color: Beige
I bought both of these caddies.
Picture 1 shows it in my living room - TV Remote, Cable Remote, Ceiling Fan Remote and glasses. I love the little handle that I can pick up when I need to clean the glass table.
Picture 2 shows the three slot remote. I put this in bed with me at night. I am older now and I need my phone on my bed at night so in this caddy I have my phone and ceiling remote fan. Also it is a good weight so it will not fall.
These caddies are so well built and so nice to look at. If you need a remote caddy you will love either of these.
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Reviewed in the United States on March 24, 2026
★★★★★ 5
Perfect!
Color: Beige
This is everything it appears to be in the picture. It's perfect. it's practical. The one that looks similar but comes on a rotating lazy Susan base is very small in the holders or pockets I don't recommend it.
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Love this little remote caddy.
Color: Black, Color: Black
First, it's very nice and compact and sturdy. I would measure it before you purchase. I like that it's small. But if you have a lot you want to store, you may want to size up. It works perfectly in our house for to keep our essentials organized.
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Reviewed in the United States on February 18, 2026
★★★★★ 5
Nicely built!
Color: Beige
This caddy arrived as promised. I love that it is built very well, solid construction. I may order another for the bedroom. It holds remotes, phone, glasses, note pad, pen, with room for more!
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Reviewed in the United States on March 10, 2026