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Description
Holley EFI Terminator X Universal MPFI KitHolley EFI Terminator X Universal MPFI Kit 58x Crank 4x Cam EV1 Injectors Drive By Wire Throttle Body and 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
Holley EFI Terminator X Universal MPFI Kit58x Crank - 4x Cam - EV1 Injectors - Drive-By-Wire Throttle Body and 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 550-928 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. 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:
- Plug and play Domestic V8 engine control, such as conventional push rod Chevrolet and Chrysler engines.
- Includes EV1 Injector Harness
- High Impedance Injector Drivers will safely power most Stock injectors, and Holley EFI Injectors. Injector support chart provided in the instructions (Will not control Low Impedance Injectors)
- Bosch LSU 4.9 wideband to relay AFR information to the ECU for accurate reading and precise tuning control.
- Built in 1bar MAP Sensor, vacuum hose adapters included (1/8th ???? ?? and 3/16ths) - or for Boosted applications, you can disable the internal MAP sensor, and utilize an external MAP Sensor, the harness comes with the connector terminated, making the install
- MAP Sensor vacuum hose adapters (1/8th ???? ?? and 3/16ths)
- Plug and plug ignition capability with Dual Sync and HyperSpark Distributors, adapter 558-323 required for HyperSpark Distributors.
- 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 domestic V8 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
Details:
- Ignition Type: Universal
- Injector Connector: Jetronic / Minitimer (Bosch)
Links
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
4.1 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
My dogs love these toys!!
Pattern Name: 8PCS No Stuffing Dog Toys
My dogs love playng fetch with this toys! They love to hear the crinkle sound of the paper, as well as the little squicker insider... They stand up to my rat terrior who is a very aggressiive chewer who plays with theses toys for hours on end!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
★★★★★ 3
Not for tough chewers
Pattern Name: No Stuffing Dog Toys, Pattern Name: No Stuffing Dog Toys
Cute, but they didn't last very long. Puppy tore them apart very quickly but she had a lot of fun doing it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 5, 2026
★★★★★ 5
FUR BABY APPROVED!!
Pattern Name: 8PCS No Stuffing Dog Toys, Pattern Name: 8PCS No Stuffing Dog Toys
I have 2 spoiled little diva fur babies that are very picky when it comes to their toys. I have an 8lb, 10 year old Schweenie (Shih
Izu/Dachshund mix) and a 1.5 lb, 11 week old Yorkie and they both LOVE LOVE LOVE no stuffing/crinkle toys. Unfortunately, we don't have many because they're hard to find and usually overpriced. This set here is worth EVERY PENNY!!! I was genuinely so shocked when these arrived. This whole set is by far the best I’ve seen or bought. Each of the toys in this set have been created with a very high quality textured fabric. Each is a different design, color and texture. As an experienced seamstress, I can confirm that each of these toys have been carefully stitched to withstand lots of play time, chewing and games of tug of war that involves sharp little teeth. This set of toys range in size from about 5” to 10”. I highly recommend this set.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 7, 2025
★★★★★ 5
Perfect for my 2 pups!!
Pattern Name: No Stuffing Dog Toys
I have 2 black Labs, one is 2 years old and the other 4 months. They LOVE to play tug o war and wrestle with toys, but my puppy with her smaller mouth and baby teeth has a hard time holding the stronger silicone chew toys (we love the brand west paw) my older dog likes. Ropes shred and are annoying. They love plush/soft toys, but once the stuffing comes out they start eating it so it’s game over. I still would get them cheap dollar store stuffies just for 10 mins of supervised fun, then they’d go in the trash. THESE however bc they have no stuffing or filling whatsoever, my dogs can just tug and tug until the fabric literally falls apart which is perfect!! With each toy we’ve gotten well over an hour of playtime, which is amazing. And they tug HARD... so while they may rip an arm off the octopus or a claw off the crab, the body stayed intact so they could keep playing. I was very impressed with the durability of the fabric. These satisfied our need for a fun, cheap toy that we were okay with getting destroyed eventually.
Will these last forever? For a big dog/tough chewer no, but they’re cheap and provide some serious fun. Yes they’re flat - they have no filling. But they are soft and adorable!! And approved by my two girls! I highly recommend and will buy again!!
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Reviewed in the United States on November 14, 2020
★★★★★ 1
Not for large dogs or chewers
Pattern Name: 8PCS No Stuffing Dog Toys
These are not for large dogs. They are cheaply made. They get dogs attention because of squeaker and crinkle but are easily torn apart (cheap fabric and felt). They might last with small dogs or puppies. Definitely not for actual chewers. Didn’t even last 15 minutes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
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