SKU: 19214605394

Holley 550-656 Dominator EFI Kit - LS1 Main Harness w/ Trans Control with EV1 Injector Harness

Sale price$2269.35 Regular price$2521.50
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Description

Holley 550-656 Dominator EFI Kit - LS1 Main Harness w/ Trans Control with EV1 Injector HarnessFits GM LS 24x Crank, 1x Cam LS1 LS6 style Engines with EV1 Injectors, and a 4L60 80E Transmission Part Number: 550 656 Dominator EFI Vehicle Management Systems are intended for non emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband oxygen sensor options, Dominator systems have nearly unlimited capabilities to control any power adder, input, or output you can throw at them. Need

Fits GM LS 24x Crank, 1x Cam - LS1/LS6 style Engines with EV1 Injectors, and a 4L60/80E Transmission

Part Number: 550-656

Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband oxygen sensor options, Dominator® systems have nearly unlimited capabilities to control any power adder, input, or output you can throw at them. Need to run a turbocharged, nitrous injected 8 cylinder running water-methanol injection? No problem with Dominator® EFI. How about control a 4L80E transmission as well as the fuel and spark on your street rod? No problem. There are also enough inputs and outputs to allow the Dominator® VMSs to serve as their own data acquisition and control module. The Dominator® VMS will eliminate the need for additional controllers as they are all contained in this one unit. The only thing limiting the Dominator® Vehicle Management System is your imagination!

Features and Benefits

• Individual cylinder fuel and spark control allows you to unlock your engine’s potential
• Store and select between four calibrations with Multi Map Selector (Part Number 558-407)
• Self-tuning fuel table strategy greatly simplifies tuning process – The more you drive it, the more it learns
• Uses Holley water/meth solenoids specially designed and calibrated for use with this EFI system to allow the user to enter water/meth flow as a percentage of fuel injector flow for water/meth tuning precision unmatched in the industry
• Allows for two nozzles to be controlled
• “Quick Start” strategies – For faster engine starting
• 1-7 Bar MAP sensor capability – For naturally aspirated or boosted applications
• Allows for use of common OEM sensors as well as custom sensor calibration input
• Optional Digital Displays - 7" Digital Dash (PN 553-106) / 3.5" Touch Screen LCD (PN 553-108)
• Data logger - Smoothing, multiple graph view, pre-defined notes fields and more..
• Kits include the following: Dominator ECU, USB cable, ECU Power Harness, Engine Main Harness, EV1 Injector Harness, Bosch Wideband, ECU mounting hardware
• Sealed automotive and marine grade connectors
• Progressive control based on time, RPM, or boost, requires part # 554-111
• DATA VISUALIZATION TOOLS
• Fuel Map and Learn Function Smoothing – Helps to smooth rough areas of the maps
• Complete control of pump activation, and low system safety features
• Fully featured boost control capability eliminates the need for a separate boost control device
• Can be configured to control boost based on time, gear, speed, and manual inputs
• Integrated dual channel wide band oxygen sensor controls – For monitoring both engine banks (NTK or Bosch sensors)
• Fully Configurable lap top Gauge Panel – Life-like gauge cluster on your laptop screen
• Can be configured “Wet” or “Dry” with closed loop feedback
• ECU is fully potted and can be mounted in the engine compartment or interior – See images for dimensions
• Strip Chart – For real-time data viewing
• Lean or rich safety cutoff
• Gear based boost control configurable by several different methods
• TURBOCHARGER BOOST CONTROL
• Data Logger –Analyze and export your data with sophisticated, but user friendly tools – Internal logger has 4 GB of memory
• 8 STAGE NITROUS OXIDE CONTROL
• INTEGRATED WATER/METHANOL INJECTION CONTROL
• Nozzles available from 400 to 1000 cc/min
• Extensive amount of inputs and outputs allow for limitless combination of options. Allows for unit to be used as a complete data acquisition system as well
• Full timing retard/control configurability per stage based on RPM or time
• Integrated drive by wire throttle body control - Can control two drive by wire throttle bodies. Compatible with a number of DBW throttle bodies including GM, Chrysler, Ford, and Nissan
• HARDWARE
• Racepak Integration Module Available.
• Integrated electronic transmission control - Operates GM 4L60E and 4L80E transmissions, Ford AODE and 4R70W with more to come in the future
• 12.3" Pro Dash (PN 553-111) and 7" Race Dash (PN 553-106) features full gauge layout customization, and nearly limitless tuning options.
• Two channel knock control sensor inputs for both one or two wire knock sensors
• “Boost Builder” functions offer the ability to assist building boost on the starting line by altering ignition timing, fueling, as well as nitrous oxide activation. Can also be used as an anti-lag function
• Fully featured nitrous control eliminates the need for a separate nitrous controller device
• Dominator EFI base kits come in several product variations to fit most popular domestic V8 engine applications such as; LS, SBC/BBC, SBF, BBF, and Chrysler engines

When utilizing a Transbrake, it is mandatory to install either a relay or, our Transbrake input protection device. P/N 554-128. This will protect the ECU from any flyback voltage when the Transbrake is released._x000D_ _x000D_ Dominator EFI systems are sold "a la carte". The following must be purchased for a complete system: ECU (includes software and programming cable), Main Power Harness, Wideband Oxygen Sensor, Main Engine Wiring Harness, Injector Wiring Harness, Ignition Adapter Harness and Accessories._x000D_ _x000D_ Certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for Ignition Protection & Fire Resistance.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 19214605394

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Melissa Watkins
Carnegie, US
★★★★★ 5
Great Bag
Color: Brown
Okay I was hesitant on buying this bag. Finally did it. I can say OMG this bag is everything. I have recently started to love carrying the backpack bags as everyday bags. The one I have is a little big so looking for a smaller one. This one is more medium size with plenty of pockets. The color was beautiful. It seems it will hold up for a while.
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Reviewed in the United States on April 1, 2026
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Monica M.
Massapequa, US
★★★★★ 5
Perfection, Or Close to It
Color: Black
I absolutely love this bag! Now that my child is a toddler, I’ve found it easiest to combine my purse and diaper bag into one bag. I no longer need to lug around a huge diaper bag full of bottles, blankets, etc., but I did need enough room to store toddler essentials (a few diapers, a changing pad, wipes, diaper cream, snacks, snack, and more snacks, medicine, a couple of wash cloths, and a toy) plus my essentials (wallet, keys, lotion, lip balm, eye drops, kindle). This has room enough for all of those things without it being an oversized purse or a full sized backpack. A lot of purses will state that they have a lot of different compartments, but the compartments won’t be a size that makes it actually useful, but this purse is different. Each compartment is spacious. Plus, the compartment on the back that’s a secure place for your phone or wallet is actually big enough to store things without having to squeeze it in! If I could give this purse 6 stars, I would. My only qualm is wishing the straps were a different material so that they wouldn’t readjust the size so easily. But if you slide the metal part up toward the decorative leather part of the strap, the leather adds friction and stops it from sliding down.
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Reviewed in the United States on May 2, 2026
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Kimberly Morgan-wigs
Lake Worth, US
★★★★★ 5
Nice looking
Color: Coffee Brown
This is the best backpack purse I have ever bought. The color it perfect. The backpack has held up perfectly .There is so much room in it sometimes I can't find stuff in it.lol
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Reviewed in the United States on May 22, 2026
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Wendy
West Palm Beach, US
★★★★★ 4
Beautiful Color
Color: Green
This was a very nice purse. It seemed to be of good quality and I loved the color. I did return it because it was just too big for my tastes and needs. I loved the functionality of it with all the pockets, but didn't want to carry around a backpack sized purse. I would recommend it for anyone who likes large purses. Seller was wonderful to work with.
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Reviewed in the United States on January 8, 2026
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MOTHER OF DRAGONS
Lowell, US
★★★★★ 5
So many pockets in this spacious backpack
Color: Green, Color: Green
I love this bag!!! Omg I can carry my entire life in here. The amount of space and pockets is ridiculous lol. The backpack is light weight and durable. I love the versatile carrying options. Having so much spaces makes with want to find more stuff just to fill it up lol. Perfect price for if you are looking for a great backpack. You can’t go wrong!
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Reviewed in the United States on May 17, 2026

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