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Description
Terminator X Max 58x/4x EV1 LS MPFI w/ DBW Throttle Body & Transmission 550-935Overview: 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
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 550-928 also has 4L60E or 4L80E Transmission control and 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 LS 4.8/5.3/6.0 LS Truck Engines and LS2/LS3 with 58x Crank, 4x Cam and 4L60E/4L80E transmissions, Drive-by wire throttle body control, and EV1 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 – 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
- Recommended Pedal part number - 10379038
- Includes: 58x/4x LS Engine Main Harness - EV1 Injector Harness - DBW Throttle Body 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 assor
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| Universal |
Specs:
| Brand | Holley EFI |
|---|---|
| Crank Reluctor | 58x |
| Emission Code | 3 |
| Ignition Type | GM LS 58x |
| Injector Connector | Jetronic / Minitimer (Bosch) |
| Product Type | Terminator X Max LS MPFI |
| Terminator LS Options | Fuel, Spark, Drive-by-Wire, Transmission |
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
4.9 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
Nice summer suit for my son
Size: 6, Color: Light Green, Size: 6, Color: Light Green
I got this linen suit for my 7 year old son and it looks really nice on him. The set comes with the blazer, vest, and pants, which makes it look very polished when worn together.
The material is lightweight and breathable, which is great for warmer weather. It has that classic linen look but still feels comfortable enough for kids to move around in. My son wore it for a few hours and didn’t complain about it being uncomfortable.
I also like the little details like the pockets, the adjustable back on the vest, and the adjustable waistband on the pants. Those features really help with getting a better fit.
Another nice thing is that you can mix and match the pieces. He can wear the vest and pants for a slightly more casual look or the full suit for more formal occasions.
Overall it’s a really nice suit for kids, especially for events like weddings, family gatherings, or school events. My son looked great in it and it worked perfectly for the occasion.
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Reviewed in the United States on March 11, 2026
★★★★★ 5
Booted & Suited
Color: Black, Size: Small, Color: Black, Size: Small
This is my 3rd son & my last to do the "prom" thing. Usually we go on a popular store chain website where you usually have to buy everything ala individually. Here I could get everything I need, 3 piece suit, button up shirt,black velvet loafers, and a wrist corsage for her & a Boutonniere for him all here on Amazon with money to spare. The suit needed a little steaming and we did have his pants hemmed we listened to the other ppl on here & realized this obviously runs very large so we reluctantly ordered a small when he usually wears a Men's medium. We were very happy because the fit looks tailor made to me so size down. If you're on the way more slender side get a XS. This runs very large my son is 5"11 and works out consistently & is approximately 155-160 lbs. The material was wonderful Nice not some weird material what you would expect for a suit/tux .I love the satin lined lapel that added some extra flair...we opted to wear a thick chain instead of the bow tie that it did come with a lot of ppl said they didn't get one, well we did. Everything in the pic on my son came from Amazon (except his Girlfriend's dress) even his unique Boutonniere & her corsage that are made from faux flowers to keep forever. I love this suit, this price, and most of all the quality you might as well just buy it because renting it is about the same price & this one you get to keep!
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Reviewed in the United States on June 4, 2024
★★★★★ 5
Decent Slim Fit Tux
Color: Midnight Black, Size: Large
This will work. In ordering the tux I don't recall seeing the set advertised as slim fit but it definitely is. My husband is 6'2" and 185 lbs. and is a runner. This suit just fits. The pants are thankfully long enough (he wears a 34/34) and the vest fits well however there doesn't seem to be an inch to spare in the jacket. He says it feels fine on, doesn't feel too snug, so that's all that matters. He needed a tux for a black tie wedding we'll be attending next month and this will fit the bill at a good price for something he'll likely never wear again. Note: the Suit comes folded up in a plastic bag and will need to be pressed before wearing.
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Reviewed in the United States on March 22, 2026
★★★★★ 5
Amazing suit and amazing price!
Color: Natural White, Size: X-Small, Color: Natural White, Size: X-Small
Can’t believe it was this cheap! Looked just like the suits friends were paying hundreds of $ for to not even buy but to rent. Would definitely recommend buying from here!
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Reviewed in the United States on May 5, 2026
★★★★★ 4
I'm going to be fair on this one
Color: Black, Size: XX-Large
TLDR; Ordered one (XL), too tight. Then ordered a size up (XXL), it was ok-ish but the sewing was horrible. Ended it up returning both and I still give them 4 stars (because this review is fair)
So to my review:
I wanted to like this suit. It had great reviews and it is, in all honesty, not that expensive. When I ordered the first suit (XL) I noticed that the fabric was super cheap but somewhat passable. The jacket did not close at all but the pants fit and they were surprisingly decent-ish. It is a slim fit suit so take it from there... the pants were tight in the leg BUT I did welcome A LOT the fact that comes with an elastic waist so it is pretty adjustable. THAT right there is probably one of my favorite things about this suit. I was on the fence of liking this suit so I thought maybe if I tried a bigger size it would made a difference.
So then I ordered an XXL and arrived the next day, great. Tried it and the jacket now fit but the pants were not the best fit of all... don't get me wrong, the elastic waist worked great and it was helpful but I definitely needed a belt for this one. Regardless, upon inspection of the new jacket I noticed that the one side was uneven. In the back, there is a separation between both sides, joined by a thin thread that joins both flaps together. You could tell that one side was longer than the other. I was upset but gave it some thought because this is what happens when you buy these type of things online, you are bound to find some items that may or may not work for you.
By the way, it comes with a nice vest (waaaaay too tight regardless the size) and a bowtie, which, in my opinion, just don't bother with this one guys
Truth be told, you can get a suit from a brand name retailer (on sale) for about $150- $200 that you might not encounter those QC issues but you might not have the same features as this one. Unfortunately, I don't have the time hoping the next one will be perfect.
It has it place in your life. If this is for a kid, prom, maybe a cheap wedding that you have to attend, it has its place given the price and features, but if you are going to use it for a gala event please don't, you will NOT look great.... that is why, even though I had to return both, I still gave it 4 stars and I will be buying a tux separates. More expensive, yes but it will also compliment my look completely. It won't be a one use only.
Hope this helps
P.S: Shipping has LOTS to be desired!! it comes in THE plastic bag that the suit comes folded in, nothing to protect it from the elements when its delivered, not even a shipping bag!!!. For that alone they will get a 1 Star (but that is on Amazon)
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Reviewed in the United States on April 28, 2023