Pay in installments of $462.49 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 19 - Aug 24
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Dominator EFI-LS1 Main Harness w/ Trans and DBW w/EV1 Injector Harness 550-657Fits GM LS 24x Crank, 1x Cam LS1 LS6 style Engines with EV1 Injectors a 4L60 80E Transmission, and a DBW Throttle Body. 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
Fits GM LS 24x Crank, 1x Cam - LS1/LS6 style Engines with EV1 Injectors a 4L60/80E Transmission, and a DBW Throttle Body.
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
4.2 ★★★★★
Based on 10 reviews
Sort
Product Reviews
★★★★★ 5
Power your way on next job. Just buy it!
Size: No Size, Style: 4V Screwdriver_Twist 2.0 2pc Set
I have every tool known to man. I have tools to fix other tools. Most of them are rubber coated for safety. But I didn’t have a powered screwdriver. Not sure why. This thing is great, I had a project where I had to take apart a Kirby vacuum and this really sped the process, looking forward to using it on 1 million other projects, versus my impact driver, which I used on most everything. Torque seems great, even loosens tight screws, and I like the 45° bend to hold the screwdriver. Seems to hold a charge very well, and it feels lightweight in hand. Not sure why I didn’t buy one 20 years ago. Good value, as I bought it on sale.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
★★★★★ 4
Perfect for small home projects
Size: No Size, Style: 4V Screwdriver_Twist 2.0 2pc Set
Good for anyone who is looking to have a small bit and doesn't really use a manual screwdriver to match or use a heavy duty drill. Good for this. Getting small tasks then but it can also screw into wood. I did test it and it's pretty well working not as fast as your regular drill can. The power is pretty high but no it does lose percentage over time. The grip of it's nice and comfortable and easy to use. Seems like it has a magnetic head to help keep your screws together is about the size of a hand but is arguably still bigger? Haven't even lost any pieces to it. Pretty high durability and good for its size
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 30, 2025
★★★★★ 5
Heavy duty tool for light work! GREAT VALUE IMHO
Size: No Size, Style: 4V Screwdriver_Twist 2.0 2pc Set, Size: No Size, Style: 4V Screwdriver_Twist 2.0 2pc Set
Great tool to add to the box. I had this in my cart as I was looking for something small that was electric and had a flexible head, mostly for auto (being able to get all but the torque in tight spaces) and also at work where I’m constantly using a driver and wanted to save my wrists some work. There are others out there, but most are Amazon only brands, which come from China and are hard to get good customer service if there’s an issue. You buy something and have an issue a year later and find that the company either doesn’t exist or has changed their name. It’s a tactic. I buy USA made when it’s available, and buy American brands like Skil and Craftsman, etc. as you can trust they’ll make things right if needed. Anyway, I love this thing. I use it multiple times a day, but it’s about 6 bolts in, work for a few hours, 6 bolts out, then back in, and so on. So I’m not running it non stop. It’s a $20-30 tool, so I don’t expect it to last with some crazy heavy use on a job site. I don’t use the bit it came with. I use this exclusively with socket driver bits. Mostly a 1/2” tool get the light work done, then pull out the torque wrench and finish it. I saw this on sale in town for the same price, so I bought one for my 17yo son who is always wrenching on stuff. Great tool to have for getting the lighter thousand turns out of the way. It would probably last forever if used around the house and charged by the book. I’ve only recharged it once and at the rate I use it one charge lasted a couple weeks. It is built very well, and has heavy-duty rubberized grip around with the body of a thicker, power tool type plastic. 100% recommended to anyone and everyone. This is the type of thing any man that actually works and fixes things around the house and garage/shop, young or old, would appreciate.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 17, 2026
★★★★★ 5
Great Price for Quality Electric Screwdriver.
Size: No Size, Style: 4V Screwdriver_Twist 2.0 2pc Set
Works well. Charges well. Charge lasts a long time. Versatile. Works well on RC Cars. Make sure you have machined bits.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2026
★★★★★ 3
Decent driver, but no real torque control
Size: No Size, Style: 4V Screwdriver_Twist 2.0 2pc Set
As others have noted, this driver works well overall, but would be better if the head could go to 90° instead of just 45°, and it comes in an extremely hard to open package. I'd like to point out a couple of other things that I haven't seen mentioned.
First, although this tool claims to have torque control via the three-level setting on the handle, it's not like most drills and drivers. With them, when the maximum torque setting is reached, a clutch disengages and the tool just 'freewheels.' But this Skil driver runs until the motor stalls, and its three settings merely control when that happens. In practical terms, that means the tool can wrench your wrist pretty badly. Even at the lowest setting the torque is considerable, making it all too easy to strip threads or even break off screw heads. This also makes it more likely to injure your wrist.
Also, in case it wasn't obvious, this tool's battery is not user-replaceable. If it runs out of power in the middle of a job... too bad. And when eventually it gets to the point where it will no longer hold a charge, Skil's only suggestion is to "Have the tool serviced by an Authorized SKIL Service Station." If you can find one, that is. If you don't want a disposable tool, this is probably not for you.
Don't get me wrong--I like this driver, and it has already come in handy in a few situations where my regular drill/driver would have been too bulky to fit. But it's good to know its limitations.
Skil also makes a smaller, less expensive 4 V screwdriver that lacks the adjustable-angle head of this one. If a straight power screwdriver is all you need, that one is worth considering:
https://www.amazon.com/Rechargeable-Cordless-Screwdriver-Circuit-Technology/dp/B07C4916LS/ref=sr_1_7
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026