SKU: 91852051882

HP EFI ECU & Harness Kits - 550-603N

Sale price$1394.97 Regular price$1549.97
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Ships within 48 hours · Estimated delivery Jul 22 - Jul 27

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Description

HP EFI ECU & Harness Kits - 550-603NOverview: 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, USCAR (EV6 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 USCAR (EV6)
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:
  1. 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
SKU: 91852051882

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jmwa47
Phoenix, US
★★★★★ 5
Gentle and convenient
Works well on the hands. Does not have the burning sensation when applied to cracked and dried hands.
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Reviewed in the United States on May 17, 2025
D
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David R.
Massapequa, US
★★★★★ 5
The tube is where it’s at!
Love the tube vs the tub!
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Reviewed in the United States on March 19, 2025
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Daniel Olson
Lowell, US
★★★★★ 5
positive comment
Excellent product and excellent delivery
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Reviewed in the United States on May 22, 2023
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that's all for now
Charlottesville, US
★★★★★ 5
Five Stars
I have loved and used this ever since my dermatologist recommended it 20 years ago.
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Reviewed in the United States on January 29, 2016
K
Kristine VA
Massapequa, US
★★★★★ 5
TOTALLY Recommend. Best product for your hands.
The best thick lotion for deep healing. 30 yrs ago when I used to clean hotel rooms and had pealing skin on my hands from chemicals, the dermatologist told me to put a ton of this on and let my hands soak. Well it worked and I’ve never found anything I like better. Original Healing formula only for my hands and feet. The liquid in this brand is good for the body and doesn’t make my skin itch. . Totally recommend this and this brand! Especially if you have allergies.
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Reviewed in the United States on June 26, 2025

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