SKU: 48988465946

HP EFI ECU & Harness Kits - 550-605

Sale price$1237.47 Regular price$1374.97
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Ships within 48 hours · Estimated delivery Aug 8 - Aug 13

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Description

HP EFI ECU & Harness Kits - 550-605Overview: Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as an alternative to the factory ECU and harness or as a replacement for your C950 ECU. The HP allows you to accurately control the fuel and ignition of your engine along with

Overview:

Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as an alternative to the factory ECU and harness or as a replacement for your C950 ECU. The HP allows you to accurately control the fuel and ignition of your engine along with additional controls for nitrous, boost or water meth.

Features:

  • NEW V2 SOFTWARE FEATURES
  • “Quick Start” ignition and fueling strategy for LS x Engines
  • Data Logger. Scalable axes, Smoothing, Multiple graph view ability, Pre-defined notes fields and many more
  • Strip Chart Real-Time Data Viewer
  • Integrated Boost Control - Boost vs Time, Boost vs Gear (Time or RPM), Boost vs RPM, Boost vs Speed, Launch control. Boost launch builder, Over-boost safeties, Boost scramble
  • Traction Control - Power reduction via timing, nitrous percentage or boost (Requires Davis Technologies Holley Module)
  • “Quick Start” fueling for all engines
  • Option for VE based fueling strategy
  • Fuel Map and Learn Function Smoothing
  • Configurable User Password Protection
  • Fully Configurable lap top Gauge Panel
  • FEATURES
  • Optional 5.7” full-color touchscreen LCD allows easy on-the-fly tuning,data-logging or can be used as an easy to see graphical gauge panel
  • Eight sequentially driven 8:2 peak and hold injector drivers, capable of driving up to 16 low or high impedance injectors as a standard feature. Multiple staged injector strategies
  • Eight channel Distributorless Ignition (DIS)outputs capable of directly driving “Smart” ignition coils or Holley DIS coils. Will drive 2 wire coils with the addition of PN 554-112 high current coil driver module
  • Plug and Play control of factory GM 24x and 58x LSx engines
  • Integrated single channel wide band oxygen sensor control. Works with NTK or Bosch sensors
  • Internal data-logging standard with a huge 2GB of memory
  • 4 Stage progressive nitrous control
  • Turbo boost control
  • Integrated water/methanol injection control
  • Self-tuning fuel table strategy greatly simplifies tuning process
  • Individual cylinder fuel and spark control allows you to unlock your engine’s potential
  • Works with 4, 6, 8 cylinder engines
  • Unique lb/hr based fueling strategy greatly simplifies and commonizes tuning
  • Advanced idle, closed loop, and enrichment strategies allow for very stable operation
  • ECU is fully potted and can be mounted in the engine compartment or interior
  • Sealed automotive and marine grade connectors
  • Allows for use of common OEM sensors as well as customer sensor calibration input
  • Ignition Plug and Play with GM 24x and 58x LSx engines, GM HEI, Ford TFI, magnetic and hall effect trigger, and other ignition systems. New Plug and Play applications in process. Custom settings can be configured to allow many other applications
  • 1-5 Bar MAP sensor capability
  • Two channel knock control sensor Inputs for both one or two wire knock sensors
  • Dedicated fuel and oil pressure inputs
  • Controls both stepper and PWM Idle Air Control (IAC) motors
  • Speed density, Alpha-N, or combination fueling strategies
  • 4 Programmable high or low Pulse Width Modulated (PWM) outputs and 4 fully configurable inputs can be configured for use
  • 4 Stage nitrous oxide control
  • Fully featured nitrous control eliminates the need for a separate nitrous controller device
  • Can be configured “Wet” or “Dry” with closed loop feedback
  • Progressive control based on time, RPM, or boost, requires part # 554-111
  • Lean or rich safety cutoff
  • Full timing retard/control configurability per stage based on RPM or time
  • Integrated Water/Methanol injection control
  • Uses Holley Water/Meth solenoids specially designed and calibrated for use with this EFI system to allow the user to enter Water/Meth flow as a percentage of fuel injector flow for Water/Meth tuning precision unmatched in the industry

Application:

Year Make Model Submodel Engine Size
Universal

Specs:

Brand Holley EFI
Emission Code 3
Ignition Type Coil - (No Timing Control)
Ignition Type Ford TFI
Ignition Type GM HEI Small Cap
Ignition Type Holley Dual Sync Distributor
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: 48988465946

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Reviewed in the United States on November 30, 2022
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Alex
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★★★★★ 5
Great Value, Versatile and Efficient
I bought this USB-C Hub 6-in-1 Adapter during summer of 2025, and it has been a game-changer for expanding my tablet connectivity options. Below is my experience with it: • The 6-in-1 design offers a variety of useful ports, including HDMI, USB-A, USB-C, and an SD card slot. It’s perfect for connecting multiple devices to my tablet or laptop at once. • The 4K HDMI port works flawlessly when I connected it to my TV and monitor, and the video quality is crisp and clear, with no lag or issues. • I also connected my tablet audio via the 3.5mm (1/8") port for the audio output and it sounded great with no delay in audio. • This 100W PD feature is fantastic. I can charge my tablet or laptop while using the hub, which is incredibly convenient when I’m working on the go. It’s great to have a single device that handles both power and data transfer. • The hub surely is compact, sleek, lightweight, portable and easy to carry around, making it ideal for travel or working remotely. • The awesome part is that no additional drivers or software needed—it's just plug and play, and it works right away. Overall: The Anker USB-C Hub 6-in-1 Adapter is a reliable and versatile solution for anyone needing to expand their tablet/laptop’s connectivity. The HDMI support, 100W power delivery, and compact design make it an excellent choice for both home and on-the-go use. Highly recommended for those who need a multi-functional hub for work, presentations, or entertainment! Keep in mind that using 45W to 100W chargers are best to use but do not exceed above 100W.
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Reviewed in the United States on October 25, 2025
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Vince
Lake Worth, US
★★★★★ 5
Anker 6-in-1 USB C Hub
I do enjoy the features of this USB-C hub. It provides the connectivity I wanted in my truck. It quickly charges any device via 85w capable USB-C pass-through charging. It offers 10Gbps USB-A ports that transfer files quickly and easily between devices. I was informed the hub functions properly with newer devices that deliver audio through the USB-C port instead of a 3.5mm aux jack. I will have to test the USB-C audio feature some day.   Pros: affordable, build quality, availability, connectivity, ease of use, portability Cons: none
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Reviewed in the United States on June 26, 2025
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Verna
Alexandria, US
★★★★★ 5
Make Sure to Use a Power Delivery Charger with this.
This hub is pretty good. If you don't use it with a PD charger though, the USB C port will not charge your phone. Even then, it will charge pretty slow. Everything else works great.
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Reviewed in the United States on July 11, 2024
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RC
Birmingham, US
★★★★★ 4
Good adaptor that does not get extremely hot, but may have wifi issues with Macbook Air M2
Received the adaptor a few days ago. I use it mainly to connect with my Macbook Air M2. It has a cool design, but not very sleek. One advantage of this product is it does not get really hot as other adaptors I have used in the past. However, there are several other issues: (1) I have been having a very poor wifi connection once this adaptor is plugged in. I was unable to connect to the internet at all. It took me hours to figure out the adaptor is the cause. Once I unplugged it, the problem was solved. I restarted my computer and plugged the adaptor in, the problem hasn't come yet after 2 days. Fingers crossed. (2) The audio headphone jack port is not working at all. Not a big deal breaker. (3) I read online that the HDMI 60 Hz is actually not supported on this adaptor. Because my external monitor is not a 4k monitor, there is no way to test this feature out.
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Reviewed in the United States on March 22, 2023

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