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- USA
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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
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Description
Holley HP EFI ECU and Harness Kits 550-602HP ECU AND HARNESS LS1 & LS6 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! Stop reflashing your factory ECU every time you make a performance modification. Get Holley EFI today!
HP ECU AND HARNESS LS1 & LS6Looking 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! Stop re–flashing your factory ECU every time you make a performance modification. Get Holley EFI today!
Features:
- Simple Installation - Plug and Play control of GM LS1/LS6 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 and and Bosch wideband 02 sensor designed to be used with GM LS1/LS6 engines with factory GM coils and a 24 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" touchscreen 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
-
Univesal
Specs
| Brand | Holley EFI |
|---|---|
| Crank Reluctor | 24x |
| Emission Code | 4 |
| Ignition Type | GM LS 24x |
| Injector Connector | Jetronic / Minitimer (Bosch) |
| Product Type | HP EFI Kit |
| Part Number | 550-602 |
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 1312 reviews
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Product Reviews
★★★★★ 5
Organized and Neat!
Size: 8 Pack, Color: Clear
I purchased these trays to organize my makeup drawer. They are perfect and fit together nicely! I love that they are see through and sturdy. Just what I needed to organize and beaten my makeup drawer.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
★★★★★ 5
The different sizes are so convenient
Size: 21 Pack, Color: Clear
It is perfect for organizing low profile drawers and/ or refrigerators. Very sturdy and easy to see through
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
★★★★★ 5
Great drawer organizers
Size: 21 Pack, Color: Clear, Size: 21 Pack, Color: Clear
Comes with grip pads for each tray. No sliding around in the drawer. Perfect sizes and ways to use. Filled 4 kitchen drawers and still extra pieces for a 5th drawer. Great for organizing craft room or anywhere. Each tray came separately bagged so no scratches. For clear plastic, seems very durable. Would buy again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 20, 2026
★★★★★ 4
Good quality organization
Size: 6 Pack, Color: Clear
I liked the quality and the flexibility of organizing.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 22, 2025
★★★★★ 5
Just what I needed for sorting my LEGO builds!
Size: 6 Pack, Color: Clear
The different sizes are perfect for sorting assorted LEGO pieces! Easy to store and stackable when not in use. Putting on the little pads on the bottom can be a bit tricky, so take your time with it! These thick plastic trays are an AWESOME value for what you get! You get (2) sets for double the storage capacity!
Very durable and crystal clear appearance! The little pads on the bottom keep these little trays in place so they don't slide around. Very satisfied with this purchase!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 1, 2026
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