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Description
HP EFI ECU & Harness Kits - 550-607Overview: 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 Bosch wideband O2 sensor, designed to be used with GM LS2/LS3/LS7 engines with factory GM coils and a 58 tooth crank sensor
- 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
4.1 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Designer quality and design
Color: Vanilla/Acorn
This is the second Michael Kors bag in my collection, and I’m pleased with both of them. These are quality items that are timeless and complement pretty much everything that i own.
At first, i thought that this was a travel bag in the sense that you would put toiletries in it, but it’s intended to be a smaller crossbody bag that you can travel with. It’s meant to hold essential items and look quite stylish while doing so.
I chose this color since my luggage set and toiletry bags are all cream and brown. Classic, chic, elegant and sophisticated without screaming that this is a designer bag.
This comes packaged beautifully and carefully so that it’s protected. The strap is adjustable on both sides. The bag lives up to Michael Kors quality and is worth every penny. I need a matching wallet or wristlet NOW.
Highly recommended if you appreciate designer products that have a higher price point but will last for years and always be in style.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
★★★★★ 5
Great wallet
Color: Gold-tone Hardware/Vanilla
Well made. Quality zippers. This is the real Michael Kors. I am really glad I purchased this. It has plenty of space and can hold a lot of change
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026
★★★★★ 5
The best wallet I have ever owned!
Color: Gold-tone Hardware/Brown
I have bought multiple brands/styles of wallets and this is my favorite hands down! You can not beat the quality and craftsmanship. I have had one of these wallets for over 3 years and use it everyday and it still looks brand new. You can not go wrong with this Michael Korrs wallet.
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Reviewed in the United States on September 30, 2025
★★★★★ 5
perfect gift
perfect gift! just the right color, size and all the features.
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Reviewed in the United States on March 12, 2026
★★★★★ 5
Great buy
Color: Gold-tone Hardware/Sahara Leather/Ivy
Great buy great quality. I love it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
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