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Ships within 48 hours · Estimated delivery Sep 19 - Sep 24
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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
4.7 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 5
Reliable and Dependable
Color: Blue
The LIANXIN Roadside Assistance Emergency Kit is a solid, thoughtfully assembled kit that every car owner should consider keeping in their trunk. It covers all the basics you’d want in an unexpected roadside situation and does so in a compact, well-organized package.
The tools feel sturdy and practical rather than cheap or disposable. Items like the jumper cables, reflective safety vest, warning triangle, and flashlight are especially useful and inspire confidence in an actual emergency. Everything fits neatly into the carrying case, making it easy to store without taking up much space.
What really stands out is the kit’s versatility—it’s suitable for daily commuters, long road trips, and even new or inexperienced drivers who want extra reassurance. It’s also a great gift idea for students, new drivers, or anyone who wants to be better prepared on the road.
Overall, the LIANXIN Roadside Assistance Emergency Kit delivers excellent value for its price. It’s practical, reliable, and provides real peace of mind knowing you’re prepared if something goes wrong. Highly recommended for any vehicle owner. 🚗🧰
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 8, 2026
★★★★★ 5
Worth every single penny.
Color: gray
I haven’t had this kit in my car for very long, but it has definitely come in handy. Especially when people leave their blown out tires in the middle of the interstate and you accidentally run it over because the traffic is so bad you can’t see it coming and it knocks the plastic protectant piece loose from under your car and starts making an awful sound because it’s being dragged across the ground on the interstate. I pulled over and used one of the zip ties in this kit to hold it up and it’s still holding it up quite nicely I might add. This is something definitely worth having around because you never know what may come your way in life.
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Reviewed in the United States on December 18, 2025
★★★★★ 4
Great Emergency car kit equipments
Color: Black, Color: Black
I bought the used/resale price at $33 instead of $48 new price. Nothing actually looked used. Most of the items are of great quality! - was actually surprised. Get this if you're looking for a budget friendly roadside emergency car kit with multiple useful items with great quality.
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Reviewed in the United States on February 15, 2026
★★★★★ 5
Great emergency kit for the car
Color: Blue
This roadside emergency kit is very useful to keep in the car. It comes with many important items for unexpected situations, feels well organized, and gives extra peace of mind while driving.
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Nice gift
Color: Blue
New driver in the family so this was a decent gift for the price
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Reviewed in the United States on April 24, 2026
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