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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
4.3 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 5
Beautiful wristlet
Color: Silver
I have really enjoyed the convenience of my wristlet and it was the perfect size.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 3, 2024
★★★★★ 5
Awesome bag!
Color: Silver
I LOVE this bag! I use it daily. My only wish is that it was larger, although it does hold much more than you might think.
I tried to post a pic of the inside and all it holds, but the app won't let me right now. I'll check back later.
Until then, the list includes...
Credit, check, and insurance cards (all 8 of them),
2 pens,
A pen light,
Fingertip spray bottle for alcohol,
Mirror,
ID,
Several business cards,
Folding phone stand shaped like a credit card,
Charging cord,
Charging battery (a hefty one with qi charging),
Prescription sunglasses inside a box for protection,
A magnifying card with light.
My phone is too big to fit in the zipper compartment (Note 10+), so I usually use a lanyard. I COULD fit it into the main compartment, but it's tight. I attach my keys to the loop with the wrist strap. Otherwise they would scratch my phone if I choose to put it inside. An expanding bottom along with just an inch added to both the height and length would make all the difference for those needed items.
If the owners/designers read this, I'd request a divider going lengthwise as well to keep my phone separate and protected. It doesn't have one, or a pocket for a large phone. I do believe, however, that the latest folding Razr or Samsung's Z-Flip would easily fit into the pockets provided with no problem.
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Reviewed in the United States on October 10, 2022
★★★★★ 5
A must have
Color: Black, Color: Black
Absolutely love
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Reviewed in the United States on December 20, 2025
★★★★★ 5
Best clutch
Color: Black
This clutch fits everything you need amd and can be used with or without a wrist strap or with the handle. Love it!!! Had for three months and is still is in "as new condition" and when I need a bigger purse, I just add this inside my tote.
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Reviewed in the United States on June 20, 2021
★★★★★ 5
Durable!
This is amazing!! I’ve had it for a year now and nothing has ripped or worn at all. (I use it pretty roughly) It’s very spacious, and great inside and outside material. And yeah it actually comes with a cute bear XD
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Reviewed in the United States on June 13, 2025