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- USA
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Ships within 48 hours · Estimated delivery Jul 15 - Jul 20
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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
4.2 ★★★★★
Based on 452 reviews
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Product Reviews
★★★★★ 5
Really nice!
Color: Cream
Very attractive and more expensive looking than its cost. I have it in red, too.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 7, 2025
★★★★★ 5
Nice Tray
Color: Black
Nice tray!
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Reviewed in the United States on October 16, 2025
★★★★★ 5
Versatile and decent size
Color: Black, Color: Black
I love little trays for random things. I saw this and had to get it. I ordered the black one. It came nicely packaged in a box that protected it from any damage during transport. It is approximately 8” x 8” x 1.6.” It is made of faux leather and MDF. It is supposedly water-resistant, but I have tested that. The interest in smooth, while the exterior walls have vertical ridges. The bottom is smooth. It’s heavy enough so it doesn’t side around. I have used it for numerous things: jewelry, pens and notepads, keys and sunglasses, perfume, medications, change, remotes, and change. It’s a handy and modern piece that could suit most people.
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Reviewed in the United States on December 11, 2025
★★★★★ 5
Small Valet Tray Nightstand Organizer (Black)
Color: Black, Color: Black
I really love the leather look of this valet tray. It’s both stylish and functional, giving a classy touch to my nightstand while keeping small items neatly organized. The PU leather finish feels smooth, looks high-end, and the construction feels sturdy.
Pros:
Elegant PU leather design with a textured finish
Compact 8x8 inch size fits perfectly on nightstands, dressers, or desks
Multi-purpose — great for keys, watches, jewelry, remotes, or glasses
Water-resistant surface makes it easy to wipe clean
Adds a decorative touch while being practical
Makes a thoughtful and stylish gift
Cons:
The sides are a little low, so bulkier items may slide out
Only available in limited colors compared to some other organizers
Overall, this is a really nice valet tray. It looks more expensive than it is, keeps my essentials in one place, and adds a clean, organized look to my space. Definitely worth it if you like the leather aesthetic!
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Reviewed in the United States on September 20, 2025
★★★★★ 5
Fits many trinkets and looks good
Color: Black
Simple little organizer for trinkets. Easy to snap together into a box shape and holds keys, pens, vapes, and other bits and pieces. My partner is happy I ordered it!
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Reviewed in the United States on October 4, 2025
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