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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 24 reviews
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Product Reviews
★★★★★ 5
High quality incredible serum
I LOVE this serum! I really feel like it hydrates my skin and it’s non greasy, easy to apply and no smells. For the price it us really good value for the money. Easily comparable to expensive products. It’s really easy for my skin to absorb and it’s lightweight.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 2, 2026
★★★★★ 5
Great for dry skin
Looovvveee this stuff. At first it feels a little sticky but once your skin absorbs it, it feels so hydrated. I was worried about using this because i have dry and sensitive skin but if anything it made my skin calm down. I haven’t broken out and i’ve been using it for a while, makes my skin so glowy too.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 1, 2026
★★★★★ 5
Best cleanser I've ever used.
This is easily and by far the best cleanser I've ever used.
I have sensitive, oily, dehydrated and aging skin. I wear mineral sunscreen, primer, and bb cream cream daily AND I smoke, so there's a lot for a cleanser to fully remove. This does, cotton ball with toner tells me so.
This cleanser is unscented, foams beautifully, and takes everything off including mascara without a pre-cleanse ( makeup remover oils or balms break me out, every time). It is gentle and doesn't strip my skin. It leaves my face actually clean and comfortable.
My serums sink in quickly after use, and my skin is noticeably less greasy during the day because it's balanced. Considering that this cleanser is also affordable and a little goes a long way, I'd say it's close to perfect. Love it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 17, 2026
★★★★★ 5
Gentle, hydrating, and perfect for sensitive skin
I’ve been impressed with this cleanser. It creates a soft, rich foam that feels great on the skin, not stripping at all. What I love most is how gentle it is. I used it consistently after a laser treatment, when my skin was especially sensitive, and it never caused any stinging, tightness, or dryness. It left my skin feeling clean, calm, and hydrated every time.
The ingredient list is solid, featuring hyaluronic acid, squalane, and ceramides, which suggests it helps maintain my skin barrier rather than breaking it down, unlike some other foaming cleansers. It’s also pH-balanced, which I think makes a big difference if you’re using active treatments or have easily irritated skin.
I’ve tried many cleansers over the years, and this is one I can see myself coming back to. Definitely planning to repurchase once I finish the bottle. A great daily cleanser for those seeking a soothing yet effective product.
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Reviewed in the United States on July 5, 2025
★★★★★ 5
Great!
Best face wash ever, makes my face clear and feel refreshed and soft
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 22, 2026
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