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Holley HP EFI Universal Retrofit Engine Management Systems 550-501 Fuel Injection Systems, Retrofit, Management, Multi Point, 4-barrel, 4500 Flange, Sensors, Fuel Rails, Regulator, Wire Harness, Kit

SKU: HLY550-501

Fuel Injection Systems

Holley HP EFI Universal Retrofit Engine Management Systems 550-501 Fuel Injection Systems, Retrofit, Management, Multi Point, 4-barrel, 4500 Flange, Sensors, Fuel Rails, Regulator, Wire Harness, Kit

SKU: HLY550-501

Fuel Injection Systems
A$9,777.53
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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Description

Progammable EFI has been simplified! Holley HP EFI universal retrofit engine management kits make it easy to install multi-point fuel injection on your Mopar, Ford, or other type engine. Holley Performance universal retrofits are designed for 4150 and 4500 carburetor-style intakes. HP kits include injector bungs and un-machined fuel rails, so you can modify them to fit any single plane 4-barrel intake manifold. You'll also receive all necessary wiring, ECU, sensors, and a throttle body. Retrofit your engine for maximum performance with complete tunability via your laptop, or opt for self-tuning capabilities and rest assured that your fuel curves are accurate. It's a new era in fuel injection and it comes with a very appealing price tag, compliments of Holley and HP EFI universal retrofit engine management systems.

Part Type

Fuel Injection Systems

Data: v4.2 - Upd: 2026-10-13 18:47:43

Specifications

Product Attributes - Brand
Holley
Product Attributes - Manufacturer's Part Number
550-501
Product Attributes - Part Type
Fuel Injection Systems
Product Attributes - Product Line
Holley HP EFI Universal Retrofit Engine Management Systems
Product Attributes - UPC
090127666890
Product Attributes - Fuel Injection Style
Multi-port
Product Attributes - Fuel Injection System Type
Single 4-Barrel Throttle Body (4150 Flange)
Product Attributes - Timing Control Compatible
Yes
Product Attributes - ECM Included
Yes
Product Attributes - Self Tuning
Yes
Product Attributes - User Tunable
Yes
Product Attributes - Fuel System Included
None
Product Attributes - Ignition System Included
None
Product Attributes - Power Distribution Included
None
Product Attributes - User Interface Included
None
Product Attributes - EGR
No
Product Attributes - Transmission Controller Included
No
Product Attributes - Metering Style
Speed density
Product Attributes - Multi-Port Fuel Rails Included
Yes
Product Attributes - Throttle Body Included
Yes
Product Attributes - Throttle Body Mounting Flange
4500 Dominator
Product Attributes - Venturi Quantity
4
Product Attributes - Venturi Diameter (mm)
54.00mm
Product Attributes - Injectors Included
No
Product Attributes - Calibration Module Included
No
Product Attributes - Wiring Harness Included
Yes
Product Attributes - Oxygen Sensor Included
No
Product Attributes - Fuel Pressure Regulator Included
No
Product Attributes - MAP Sensor Included
No
Product Attributes - IAT Sensor Included
No
Product Attributes - TPS Sensor Included
No
Product Attributes - IAC Motor Included
No
Product Attributes - Quantity
Sold as a kit.

Reference Information

Brand Name/s Holley
StreetFX SKU hly550-501
SFX Item ID 4782858
Supplier Item Code 4782858
Manufacturer SKU 550-501
Manufacturer UPC 90127666890
Alternative References HOL550-501, 4-barrel

Compatibility

Application Data
  • UniversalYes
    Fuel TypeGAS

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