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Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
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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:
- 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
4.1 ★★★★★
Based on 46 reviews
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Product Reviews
★★★★★ 4
Amazon should know how to deliver books without damaging.
Format: Board book, Format: Board book
This is a fantastic book and the back has fun facts, plus a dedication the minor planet Pluto that was not included. If you are Gen-x you know that acknowledging Pluto on the back just warms yor heart.
Most of the science info is on the back cover. The board book focuses on naming the planets and the artistry. I think this is great and the extra facts on the back are better for older kids who might want to pretend they are too big for baby books.
This is a really beautiful book, but there was damage. The lip is all suffered up and marred (2nd picture) and where you open the book (1st picture) there is already a wear crease. I blame the defects on Amazon, but a cellophane wrap might have helped prevent the damage
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Reviewed in the United States on November 2, 2025
★★★★★ 5
Fun way to learn about the planets
Format: Board book
An awesome book. One of my toddlers favorites. Love the cut outs and pictures as well as the content. Its a fun way to learn about the planets
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 15, 2026
★★★★★ 5
Such a great and important book
Format: Kindle
"Perseverance Makes Me Stronger" by Elizabeth Cole is an exceptional children's book that beautifully captures the essence of determination, resilience, and personal growth. Through the endearing story of young Nick and his roller skating journey, Cole delivers a powerful message that will inspire and motivate young readers.
The book revolves around Nick, a little boy who receives a pair of shiny new roller skates. Excitement quickly turns to frustration when Nick realizes that learning to skate is not as easy as he imagined. Discouraged by the challenges he faces, Nick contemplates giving up. However, with the unwavering support and guidance of his father, he learns the true meaning of perseverance.
Cole's storytelling is enchanting, and the relatable nature of Nick's struggles immediately captures the attention of young readers. The writing style is simple and accessible, making it easy for children to understand and engage with the narrative. The book is filled with colorful illustrations that vividly depict Nick's roller skating journey, further enhancing the reading experience.
One of the most commendable aspects of "Perseverance Makes Me Stronger" is the valuable life lesson it imparts. Through Nick's story, children learn the importance of persistence and the rewards that come with not giving up. The book teaches young readers that setbacks and challenges are a natural part of learning and growth, and that by persevering, they can overcome any obstacle.
The character of Nick is endearing and relatable, and children will easily connect with his feelings of frustration and self-doubt. As the story unfolds, they will witness his transformation, gaining a sense of empowerment and encouragement. Nick's journey serves as an inspiring example for young readers, showing them that with determination and support, they too can achieve their goals.
"Perseverance Makes Me Stronger" is an excellent tool for parents, educators, and caregivers to introduce children to the concept of perseverance in an engaging and relatable way. It opens up conversations about the importance of persistence, resilience, and the value of learning from mistakes. The book provides an opportunity for children to develop a growth mindset and understand that their efforts and dedication can lead to success.
In conclusion, "Perseverance Makes Me Stronger" by Elizabeth Cole is a heartwarming and impactful children's book that celebrates the power of perseverance. Through Nick's roller skating adventure, young readers are encouraged to embrace challenges, never give up, and discover their own inner strength. This delightful tale is sure to captivate young minds and leave a lasting impression, making it a valuable addition to any child's library.
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Reviewed in the United States on July 8, 2023
★★★★★ 5
Excellent children’s book on perseverance!
Format: Kindle, Format: Kindle
This is the seventh story about little Nick in the “World of Kids’ Emotions” series by author Elizabeth Cole.
I have read all the books in this series and have shared them with my young grandson over the years. Emotions can be difficult for boys and girls too!
I like how in this story Nick is trying rollerskating! He’s not doing very well and gets discouraged. Fortunately, his father offers some encouragement to persevere and keep at it!
His mother tried baking cakes. At first she did not do a good job, but later mastered the skill of baking cakes. Other examples are used throughout the book to show that trying to do your best and having a goal are great ways to approach persevering!
“Perseverance makes me stronger.” I love the positive messages that are in this book. Positive self talk and encouraging oneself are helpful tools. “No matter the outcome, at least I did try!” ”My dreams will come true because I believe in myself.”
There are some positive affirmations at the end of the book. And also a free coloring page that can be downloaded with a scan code.
The illustrations are very nice to look at and colorful. The artist did a lovely job. The illustrations go along with the storyline nicely.
The writing in this book has a pleasant flow with lots of rhyming words. “Perseverance means not quitting right away, but keep trying more and more, day after day.”
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Reviewed in the United States on June 11, 2023
★★★★★ 5
Great book to never give up
Format: Paperback
Great book! My son loves it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 13, 2026
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