Pay in installments of $387.49 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours Β· Estimated delivery Aug 14 - Aug 19
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
HP EFI ECU & Harness Kits - 550-607NOverview: Looking for a plug and play kit for your GM LS engine? The HP ECU allows you to accurately control the fuel and ignition of your engine plus much more. Got a stock LS engine? Simply download a base map and you're on your way. Got a turbocharged, nitrous fed LS engine on water meth? This HP EFI kit can control that too! Features: Simple Installation Plug and Play control of GM LS2 LS3 LS7 engines. Just plug the harness into your factory
Overview:
Looking for a plug and play kit for your GM LS engine? The HP ECU allows you to accurately control the fuel and ignition of your engine plus much more. Got a stock LS engine? Simply download a base map and you're on your way. Got a turbocharged, nitrous fed LS engine on water/meth? This HP EFI kit can control that too!
Features:
- Simple Installation - Plug and Play control of GM LS2/LS3/LS7 engines. Just plug the harness into your factory sensors, wire the power and grounds and you are ready to take complete control of your LS engine
- More Functionality - Provides significantly more functionality than OEM or other competitive ECUs (boost control, nitrous control, water/meth injection, plus a host of additional inputs and outputs to control fans, pumps, relays etc.)
- Easy To Use - Laptop programmable ECU includes a variety of base maps that will have you hitting the cruise or track in no time
- Ideal For Everything - including stock 5.3L engine swaps or all out, 3,000+ horsepower race cars that need a simple and powerful ECU and harness solution
- Industry Leading Self Tuning Fuel Strategy - means less time tuning and more time enjoying the power of your LS vehicle
- Kit includes ECU, harness, communication cable, software, Jetronic/Minitimer (Bosch style) injector connectors, and NTK wideband O2 sensor, designed to be used with GM LS2/LS3/LS7 engines with factory GM coils and a 58 tooth crank sensor
- The NTK Oxygen Sensor is recommended when using leaded or methanol fuels, high exhaust and forced induction applications or for highest precision feedback
- ECU is fully potted and can be mounted in the engine compartment or interior
- Sealed automotive and marine grade connectors
- 1-5 Bar MAP sensor capability
- Optional plug and play hand-held programmer, 5.7" touch screen and digital gauges are available for ultimate control and vehicle monitoring
- ECU is certified to ISO 8846, SAE J1171 & United States Coast Guard Requirements for Ignition Protection & Fire Resistance
- For a full list of advanced features such as boost, nitrous, water/meth, individual cylinder control and more click the document icon under the product image!
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| Universal |
Specs:
| Brand | Holley EFI |
|---|---|
| Crank Reluctor | 58x |
| Emission Code | 4 |
| Ignition Type | GM LS 58x |
| Injector Connector | Jetronic / Minitimer (Bosch) |
| Product Type | HP EFI Kit |
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
4.6 β
β
β
β
β
Based on 24 reviews
Sort
Product Reviews
β
β
β
β
β
5
No More Messy Looking Cords Everywhere
Color: Wooden Black
These are such a great find! My office, bedroom and living room look so much cleaner now! The sizes were just right to meet our needs. The colors matched our decor and the cords no longer stick out like a sore thumb. It was easy to get the power strip and the cords organized inside the boxes and using these is just the perfect solution to a messy problem. Highly recommended!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 11, 2026
β
β
β
β
β
4
Hides the cords well
Color: Wooden Black
Very subtle and hides the cords and surge protector well. They look appealing and blend in with other items well allowing them to not stand out. I wish the lid snapped on, though. Depending on the cords, it sometimes sticks up. But is an easy fix.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 12, 2025
β
β
β
β
β
5
Great cord management
Color: Wooden Black
Really keeps my office desk clean and organized. Works perfectly ti hide all the extras courds.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 26, 2025
β
β
β
β
β
5
Cable Management Box - Stylish and Functional!
The woodtone cable management box has not only decluttered my workspace but also added a touch of style. The quality of the wood finish is impressive, seamlessly blending with my decor.
The box easily conceals and organizes cables, reducing the visual chaos. However, the lid could fit a bit more snugly to enhance the overall aesthetic. Regardless, it's a practical and visually appealing solution for keeping cables tidy. A must-have for those looking to maintain a clean and organized workspace with a touch of sophistication.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 20, 2024
β
β
β
β
β
5
Two Computer Setups Organized!
Color: White
I am so happy with my purchase. I bought these with a coupon and I wouldβve paid full price. The boxes are the perfect size and store. Everything I need for four monitors, two docking stations, and two laptops. And for an added bonus, the cat doesnβt even notice the wires and just sits on top of the box.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 13, 2025