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Description
HP EFI Universal MPI Retrofit Kits - 550-501Overview: Do you have a Mopar, Ford or other type engine you want to install multi port fuel injection on? No, problem, the Holley HP universal MPI retrofit EFI kits are designed to be used with any V 8 intake manifold. The kit comes with injector bungs and un machined fuel rails so you can modify to fit any single plane 4bbl intake manifold. The HP universal retrofit kits also come with the necessary wiring, ECU, sensors and throttle body. Just
Overview:
Do you have a Mopar, Ford or other type engine you want to install multi-port fuel injection on? No, problem, the Holley HP universal MPI retrofit EFI kits are designed to be used with any V-8 intake manifold. The kit comes with injector bungs and un-machined fuel rails so you can modify to fit any single plane 4bbl intake manifold. The HP universal retrofit kits also come with the necessary wiring, ECU, sensors and throttle body. Just select the fuel pump and injectors of choice and you are off and running.
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 tu
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| Universal |
Specs:
| Brand | Holley EFI |
|---|---|
| Emission Code | 3 |
| Product Type | Universal Multi Port |
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]
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4.3 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Perfect aged book
Format: Paperback
I truly liked this book for our son when he was 3 years old. It was done very simple and to the point. It allowed you as a parent to add on if you wanted and to talk about the pages. This was a very helpful book in our house.
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Reviewed in the United States on January 2, 2026
★★★★★ 5
Engaging & Effective for toddlers w/Autism!
Format: Paperback, Format: Paperback
My almost 3 year old was recently diagnosed with Autism. He struggles with transitions and also has a speech delay, which often contributes to big meltdowns when he doesn’t get his way. He’s been a “hitter” since about 18M… and it’s so hard! I know he has big emotions and can’t regulate them easily. This book is FANTASTIC! It’s easy to read and has cute and relatable illustrations.
It can be a little repetitive, but that’s what helps get the point across. Let’s face it, my son is also very repetitive, so it seems to resonate with him. It talks about different feelings and emotions, how it’s ok to feel that way, and how to handle them without hitting. For example, you can use your words to ask a grownup for help; you can draw an angry picture; you can squeeze your hands into a ball and release them, etc. There’s different options for different scenarios, and each one is described in a way that toddlers can figure out how to do it themselves. His favorite is to squeeze his hands into a fist, or give his body a big “squeeze hug.” I’ve already caught him doing that a few times instead of slapping me!
It’ll take practice (like the book mentions) but I think he’ll be able to self-regulate better with some of these ideas!! I also have some new phrases to use and picked up some sign language. I love the tips for caregivers in the back!
If you have a hitter (especially one on the spectrum), you need this! I actually like it better than our other book, Hands Are Not for Hitting. Similar story line, but this one is more detailed and better suited for older toddlers. I highly recommend it!!
Hope this helps ☺️
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Reviewed in the United States on March 14, 2022
★★★★★ 5
Wonderful Book for Toddlers and Up!
Format: Paperback, Format: Paperback
Great book for toddlers or older! I bought this for my 2.5 y.o. and she would request me to read it every night. She would demonstrate some of the techniques described in the book at her own voilition, which was awesome because it showed that a couple methods were 'sticking.' The next step was trying to help her to perform the technique when needed....like when wanting to hit her brother, which is a bit more challenging!
The illustrations are beautiful, large, and colorful. There's one sentence that I think is confusing for little ones to comprehend, such as the breathing method you'd use when blowing bubbles or a pinwheel. I wish there was an "as if" in there so it's taken less literally. However, the flow of the book is nice. It goes through situations which might occur, how you might feel, and then the techniques. Love the page that summarizes all the techniques and the 6 strategies in the back for parents. The pages are a slightly thicker than most paperbacks for kids - more durable for sure, which I appreciate. It's written by a child psychologist, so you know it's going to be a book of quality!
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Reviewed in the United States on January 23, 2025
★★★★★ 5
Well done
Format: Hardcover
Beautiful book. Big, beautiful illustrations. The reading is easy though some of the concepts may be a little difficult for younger ones to grasp. Though this just leaves a great opportunity for further discussion on all the different reasons for crying. Great teaching tool. The illustrations do a wonderful job depicting these deeper concepts. Readers may find themselves lingering a little bit on each page, after the reading is done, absorbing the meaning of the words and pictures. Very well done.
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Reviewed in the United States on May 17, 2020
★★★★★ 5
Beautiful book, sweet message
Format: Hardcover
Go ahead and buy it for all the kids you know
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Reviewed in the United States on December 11, 2021