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Description
Dominator EFI-LS1 Main Harness w/ Trans Control w/EV1 Injector Harness 550-656Fits GM LS 24x Crank, 1x Cam LS1 LS6 style Engines with EV1 Injectors, and a 4L60 80E Transmission Features: 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 engines1 Kits include the following: Dominator ECU, USB cable, ECU Power Harness, Engine Main Harness, EV1 Injector Harness, Bosch Wideband, ECU mounting hardware2 Integrated electronic
Fits GM LS 24x Crank, 1x Cam - LS1/LS6 style Engines with EV1 Injectors, and a 4L60/80E Transmission
Features:
- 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 engines1
- Kits include the following: Dominator ECU, USB cable, ECU Power Harness, Engine Main Harness, EV1 Injector Harness, Bosch Wideband, ECU mounting hardware2
- Integrated electronic transmission control - Operates GM 4L60E and 4L80E transmissions, Ford AODE and 4R70W with more to come in the future3
- 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 Nissan4
- Integrated dual channel wide band oxygen sensor controls ? For monitoring both engine banks (NTK or Bosch sensors)5
- 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 well6
- Individual cylinder fuel and spark control allows you to unlock your engine?s potential7
- 1-7 Bar MAP sensor capability ? For naturally aspirated or boosted applications8
- Fuel Map and Learn Function Smoothing ? Helps to smooth rough areas of the maps9
- Self-tuning fuel table strategy greatly simplifies tuning process ? The more you drive it, the more it learns10
- ?Quick Start? strategies ? For faster engine starting11
- Allows for use of common OEM sensors as well as custom sensor calibration input12
- Two channel knock control sensor inputs for both one or two wire knock sensors13
- Store and select between four calibrations with Multi Map Selector (Part Number 558-407)14
- HARDWARE15
- ECU is fully potted and can be mounted in the engine compartment or interior ? See images for dimensions16
- Sealed automotive and marine grade connectors17
- Optional Digital Displays - 7" Digital Dash (PN 553-106) / 3.5" Touch Screen LCD (PN 553-108)18
- 12.3" Pro Dash (PN 553-111) and 7" Race Dash (PN 553-106) features full gauge layout customization, and nearly limitless tuning options.19
- DATA VISUALIZATION TOOLS20
- Data Logger ?Analyze and export your data with sophisticated, but user friendly tools ? Internal logger has 4 GB of memory21
- Strip Chart ? For real-time data viewing22
- Fully Configurable lap top Gauge Panel ? Life-like gauge cluster on your laptop screen23
- Racepak Integration Module Available.24
- Data logger - Smoothing, multiple graph view, pre-defined notes fields and more..25
- 8 STAGE NITROUS OXIDE CONTROL26
- Fully featured nitrous control eliminates the need for a separate nitrous controller device27
- Can be configured ?Wet? or ?Dry? with closed loop feedback28
- Progressive control based on time, RPM, or boost, requires part # 554-11129
- Lean or rich safety cutoff30
- Full timing retard/control configurability per stage based on RPM or time31
- INTEGRATED WATER/METHANOL INJECTION CONTROL32
- 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 industry33
- Allows for two nozzles to be controlled34
- Nozzles available from 400 to 1000 cc/min35
- Complete control of pump activation, and low system safety features36
- TURBOCHARGER BOOST CONTROL37
- Fully featured boost control capability eliminates the need for a separate boost control device38
- Can be configured to control boost based on time, gear, speed, and manual inputs39
- Gear based boost control configurable by several different methods40
- ?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 function41
Specs:
| Accelerometer Support | Yes |
|---|---|
| Boost Control | Yes |
| Brand | Holley EFI |
| CAN-BUS Support | Yes |
| Category Filter | Fuel Injection - EFI |
| Clearance Category | Fuel Injection - EFI |
| Coast Guard Approved | Yes |
| Coil Per Cylinder Ignition Support | Yes |
| Datalogging Support | Yes |
| Dry Nitrous Control | Yes |
| e85 Support | Yes |
| EGT Support | Yes |
| Emission Code | 3 |
| Engine | GM LS1/LS2/LS6 |
| Forced Induction Support | Yes |
| Fuel Filter Included | No |
| Fuel Hose Included | No |
| Fuel Injectors Included | No |
| Fuel Pressure Regulator Included | No |
| Fuel Pump Included | No |
| Grade Type | Performance |
| Height | variable 1.00" to 1.84" |
| Ignition Timing Control | Yes |
| Individual Cylinder Fuel Corrections | Yes |
| Intake Manifold Included | No |
| Knock Retard Support | Yes |
| Length | 13.14" overall |
| Mounting Bolt Pattern | 12.13"x 6.10" |
| Multi-Stage Nitrous Control | Yes |
| Product Type | Dominator ECU - ECM - VCM |
| Progressive Nitrous Control | Yes |
| Self-Tuning | Yes |
| Throttle Position Sensor Included | No |
| Traction Control Support | Yes |
| User-Tuneable | Yes |
| Warning | California Proposition 65 |
| Wet Nitrous Control | Yes |
| Width | 6.10" overall |
Application:
| Year | Make | Model | Submodel |
|---|---|---|---|
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
4.5 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 4
Not really medium, but a quality pillow nonetheless
Size: Standard (Mid Loft), Number of Items: 1
It is absolutely the case that with this type of product, most people who review it don't actually know what they're talking about. Latex foam pillows are not like any other kind of pillow, so your expectations have to be completely different. It's not about thickness, height, or anything else but comfort. Comfort in this case comes from you choosing the correct level of FIRMNESS. Since each company has their own idea of what constitutes each level, the difficulty is figuring out which one is going to work for you. Your spine - including your neck, should not be anything but straight/aligned when your head sinks in. Regardless of what the pillow LOOKS like, it is how your head lays that matters. Latex foam is not like memory foam AT ALL, so don't expect it to be. LF bounces back immediately when you move off of it, and it can last for a very, very long time with proper care. Yes, it does have a natural, rubber odor. This fades a bit with time, but will never go away. After all, it IS a rubber product. EXPECT A SCENT! To keep yourself from being bothered, and to extend the life of the pillow, use TWO different types of pillow covers. As a first layer, I use one meant for encasement from allergens and bugs. It's waterproof (not vinyl, and not loud). It's the kind that cannot go in the dryer after being washed. The second layer is a simple cotton cover/case that you should wash and dry depending on factors like oil production, frequency in hair washing, and frequency in sheet changing, etc. Using both will dramatically extend the life of the pillow. Water is the enemy. Moisture will cause the foam to break down into pieces. The crumbling is pretty nasty, so avoid it! The case this one comes in is admittedly cheap and pathetic. Not every company has such poor ones, but it won't make a difference if you add the layers I have suggested. *This IS a real latex foam pillow. I have owned enough to know what they smell and feel like. I bought a "medium". I would call it a firm "soft", and so it wasn't for me. Find the right firmness for your neck and sleep needs, and don't blame the damn company for your choice! These ARE the correct height, they smell normal, and the price is average (they're ALL overpriced)!
*This does not seem like a completely latex product, but it is close enough that if it were actually medium firmness, I would have kept it.
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Reviewed in the United States on July 15, 2025
★★★★★ 5
Perfect size, perfect pillow.
Size: Queen (High Loft), Number of Items: 1
For me, This pillow is the be all and end all when it comes to comfort. I simply melt into luxurious sleep. I have had a bad neck since my early 20’s, so a pillow that doesn’t fit me, can break me. I have spent soooo much money on pillows trying to find The One. Foam is the only way to go in that regard.
Another aspect about this pillow that is particularly important to me is how well it fits into my satin pillow case, with no room to slide around, or for the material to bunch up.
I allowed the pillow to air on a chair for 24 hours before use, but am still getting a slight odor.
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Reviewed in the United States on March 7, 2026
★★★★★ 3
Medium firmness is too flat
Size: Standard (Mid Loft), Number of Items: 1
I got the medium firmness, and it is much flatter than it appears in the photo. I like the feeling and firmness of it, but the height is too flat and causes my neck to strain. I had to return.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Finally, a great pillow!
Size: Standard (Mid Loft), Number of Items: 1
Finally! After so much wasted money on sooooo many pillows, I come across this beauty! This pillow is amazing! I got the medium one, and it’s so perfect. Soft, yet supportive. I’m still surprised at how much I love it!
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Reviewed in the United States on April 2, 2026
★★★★★ 5
LOVE IT !
Size: Queen (Mid Loft), Number of Items: 1
I love this pillow. It is just right, firm enough yet soft. My head sinks in and is very comfortable. When I lift my head, the pillow bounces right back into shape. If it lasts, I will buy my family each a pillow as it is wonderful. I woke up with zero neck pain as I typically did when using a standard foam pillow. There is a very light scent yet when I covered the pillow with a protector casing and then a cotton case, there was zero scent. I highly recommend. Especially when compared to the comfort of a very expensive latex pillow my husband uses.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 7, 2026
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