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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
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Description
HP EFI Universal MPI Retrofit Kits - 550-500Overview: 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 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
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 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 |
| Ignition Type | CD Ignition (No Timing Control) |
| Injector Connector | Jetronic / Minitimer (Bosch) |
| Product Type | Universal Multi Port |
| Terminator LS Options | Fuel, Spark |
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
4.8 ★★★★★
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Product Reviews
★★★★★ 5
Great value - functions well with fairly easy setup.
I found the setup to be fairly simple. It performs exactly as I hoped. I needed a printer, copier and scanner - it is a great value. I did have to do some research to complete the scanner setup - that could have been easier overall.
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Reviewed in the United States on April 6, 2026
★★★★★ 5
Office‑grade, solid, fast, and capable.
I didn’t just buy a different printer — I moved up a class.
Compared to my Canon PIXMA: I feel about the Epson WF 4834 the way someone feels when they finally replace a flimsy folding chair with an actual piece of furniture. The difference isn’t subtle — it’s structural.
Price is awesome. I’m getting my money’s worth and more. Solid machine. Super easy to install on my network. Wireless connection is great! I print from different rooms all the time. Print quality is outstanding, professional looking. Easy to use, period. So far, I’m not disappointed.
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Reviewed in the United States on June 13, 2026
★★★★★ 4
Great Value! Great Printer
THE ONLY reason I can't give it a five is because it is the only printer I have ever seen with two trays that you have to print one or the other. Aside from that, BEST Scanner App EVER! Easy!! Hardly ever jams and then only when I put too many in, rushing to finish. The quality is fantastic!
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Reviewed in the United States on June 11, 2026
★★★★★ 5
Quick and easy set up
Quick set up! Easy to pair with cable signal -worked great. Scan/fax/copy.
Will see about ink refills when needed.
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Reviewed in the United States on May 3, 2026
★★★★★ 1
Hands down, the WORST printer I have ever owned. In THIRTY years.
I love Epson print quality so when my Epson finally bit the dust I HAD TO have another Epson. After lots of research I bought this one.
It takes FOREVER to wake up and print. It shouldn’t take 5 minutes to wake up.
I am a VERY light user. At the time of this initial review I'd maybe printed 500 pages total, so it's not like this thing has been put through the ringer or anything.
This thing CONSTANTLY jams. Or says it’s jammed. It may or may not be. But you’ll have to go through the motions every time you want to use it anyhow.
It burns through ink faster than a cracked out toddler dumping paint all over the floors and walls.
WHEN ONE COLOR RUNS OUT YOU CAN NO LONGER PRINT B&W
I’m sure there are more reasons why I hate this printer, I’ll try to come back to add them if I think of them.
THIS PRINTER HAS INSPIRED ME TO DISASSEMBLE MY OLD EPSON AND BECOME A PRINTER REPAIR TECH IN MY FREE TIME IN HOPES OF GETTING THAT ONE TO WORK. I don’t recommend that route either.
I think Epson has lost me forever.
All I want is a printer with their great print quality, two paper trays that accept different sizes, and a rear loader for heavier paper, that doesn’t cost an arm and a leg. My old WorkForce did all of that beautifully and for whatever reasons they decided that shouldn’t be an option anymore. RUDE.
UPDATE: This pile of junk will ALSO say that it is out of paper when in fact it is not. I hate it, so so so much.
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Reviewed in the United States on September 2, 2022
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