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FAST XFI Street Engine Control Units 304003 ECU

SKU: FST304003

Computers

FST EFI Kits...

FAST XFI Street Engine Control Units 304003 ECU

SKU: FST304003

Computers

FST EFI Kits...

A$1,808.56
LAST ONE! Est Ship 4-7 days. In stock at 1 location (only 1 available)

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Description

Engine Control Module - XFI Street - Internal Data Logging - Universal - Kit

XFI Strt Upgrade

The engineers at FAST® designed this all-new, laptop-tunable ECU to appeal to customers and dealers with simple EFI needs, but who prefer the greater flexibility afforded by laptop tuning. The XFI Street Engine Management System provides a cost-effective option for those customers who don't need the most high-end system, but also want complete control. Since XFI Streetâ„¢ uses the same wiring as the EZ-EFI, it could easily be installed in place of an existing EZ-EFI ECU. Utilizing included C-Com® software, XFI Street can be used to tune an engine whose characteristics are not ideal for the self-tuning features EZ-EFI provides. The XFI Street Engine Management System has data logging capability when connected to a laptop. The unit is offered in kits with an EZ four-injector throttle body and with or without a multi-port harness. It is intended only for naturally aspirated engines.

Additional Information

The XFI Street Upgrade Kit contains everything needed to take your EZ-EFI Fuel to the next level. Including a new ECU, C-Com software and a communication cable, this kit is the most cost-effective way to make your EZ-EFI laptop tunable.

Application Summary

Applications with existing EZ-EFI Fuel Throttle Body EFI System or EZ-EFI Fuel Multi-Port Fuel Injection System.

Part Type

Fuel Injection System


Data: v2 - Desc: v4.2 - Upd: 2026-11-08 01:01:22

Data: v4.2 - Upd: 2026-11-08 07:47:03

Features

Vehicle Compatibility and Return Conditions.

This item was designed and engineered in the USA for US domestic vehicles. OBD tools, ECUs, dongles, programmers, and tuners may have limited compatibility with vehicles outside the USA due to regional differences in emission standards and system configurations. Some features and functionality may vary depending on the vehicle and location.

Some electronic tuning devices and programmers require activation, registration, or pairing with a specific vehicle’s VIN (Vehicle Identification Number). Once activated or paired, these devices may become permanently associated with that vehicle, restricting or preventing their use on another vehicle, resticting our ability to offer returns or exchanges.

Please review the product details and images to ensure it meets your needs. For clarification or assistance, feel free to contact a StreetFX agent. Note: Returns are not accepted for special order or tuning products unless the unit is deemed faulty.

(keyword: ecu)

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Fast, FAST ELECTRONICS
StreetFX SKU fst304003
SFX Item ID 4085017
Accounting SKU fst-304003
Manufacturer SKU 304003
Manufacturer UPC 036584184294
Alternative References 304003, FST-304003

ECU

All new from FAST, the XFI Street engine control units give you a more cost-effective system with the flexibility of laptop tuning. This system uses the same wiring as the FAST EZ-EFI and can be installed in place of an EZ-EFI ECU. The XFI Street unit offers data logging when connected to a laptop and is designed for only naturally aspirated engines. This system is offered with a multi-port harness (also available with an EZ-EFI 4-injector throttle body and harness, or in a retrofit kit for adding an XFI Street ECU to an existing EZ-EFI installation).

Some of the FAST XFI Street engine control units' standard features include:
• Perfect for custom individual runner induction systems
• Easy-to-use software for novice and experienced tuners
• Data logging makes tuning and troubleshooting easier
• Advanced diagnostics help maintain peak performance
• Direct plug-in capability with EZ-EFI fuel wiring harness and throttle bodies; only need to replace ECU to upgrade system

Product Attributes
BrandFAST
Manufacturer's Part Number304003
Part TypeComputers
Product LineFAST XFI Street Engine Control Units
UPC00036584323815
PROM Installation or Computer Flash RequiredNo
RemanufacturedNo
QuantitySold individually.
NotesThis is the replacement ECU for the FAST XFI Street engine management system.

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