SKU: 74723382093

HP EFI ECU & Harness Kits - 550-607

Sale price$1282.47 Regular price$1424.97
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 12 - Jul 17

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

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:
  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: 74723382093

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.8 ★★★★★
Based on 1006 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
F
Verified Purchase
Frank price
Lowell, US
★★★★★ 5
Love
Color: Fresh Color
Love
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 1, 2026
G
Verified Purchase
Gina Sperry
Waukegan, US
★★★★★ 1
Terrible
Color: Fresh Color, Color: Fresh Color
Should be a zero! Would be shocked if these are cotton at all! Feels like polyester, unravels after one wash in a lingerie bag on handwashing—horrible!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 20, 2026
J
Verified Purchase
JewelsfromJerri
Omaha, US
★★★★★ 5
Fun, Durable Balls for smaller heavy chewers
Color: Four colors, Size: 5cm (ball only)
Perfect size and strength for my small dog that is a heavy chewer! She hasn’t been able to destroy and chew up this one like she has with every other toy! Definitely chew resistant.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
J
Verified Purchase
Jen Johnson
Cuba, US
★★★★★ 5
Bouncy and durable
Color: Four colors, Size: 5cm (ball only), Color: Four colors, Size: 5cm (ball only)
These balls are awesome - bouncy and super durable for my little guy!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
D
Verified Purchase
Dawn
Battle Creek, US
★★★★★ 5
Great quality
Color: Four colors, Size: 5cm (ball only)
I was very surprised that these are as good as the chuck it balls. I have a super chewer and he’s tears balls up except for chuck its and he can’t tear these up.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026

recommand products