What is the purpose of the XFI Main Harness?

The XFI Main Harness connects your XFI ECU to various sensors, digital dashes, EGT modules, and other optional accessories. It also facilitates communication between the ECU and ignition devices, ensuring all components work together.

What vehicles are compatible with this harness?

This FAST XFI Main Harness is specifically designed for Chrysler 5.7L and 6.1L Hemi engines. Make sure your engine matches these specs before purchasing.

Can I create my own custom harness using FAST components?

Yes, FAST offers main harnesses that are terminated on the sensor side but non-terminated on the ECU side, allowing for a custom fit. All terminals, seals, and connectors are available individually if you want to build a harness from scratch.

FAST Chrysler 5.7L/6.1L Hemi XFI Main Harness

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FAST

FAST Chrysler 5.7L/6.1L Hemi XFI Main Harness

Name: FAST Chrysler 5.7L/6.1L Hemi XFI Main Harness
Brand: FAST
Price: 571.42 USD
Availability: InStock

$571.42

Connects your XFI ECU to sensors and accessories. For Chrysler 5.7L and 6.1L Hemis.

Key Features

Connects XFI ECU to sensors
Connects to digital dashes — for monitoring
Connects to EGT modules — for monitoring exhaust temps
Connects to optional accessories
Handles communication between ECU and ignition devices

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

Will this fit your vehicle?

Compatible with 124 vehicles

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Product Details

XFI Main Harness designed for integration with engines whose sensors feature Mopar style sensors.

FAST offers several main harness options to aC-Commodate most customers' needs. The XFI Main Harness is responsible for connecting your XFI ECU to sensors as well as digital dashes, EGT modules, and various optional accessories. The Main Harness also handles communication between the ECU and ignition devices. Main harnesses are available in TPI, LT-1, LS-1 through 9 (including truck/suv designs), Modern Hemi, Carburetor Conversions and even Rear-Engine Dragsters and Boats. FAST also offers Main Harnesses that come terminated on the sensor side but non-terminated on the ECU side to allow for a truely custom fit. All terminals, seals and connectors are available individually, so don't hesitate to try your hand at crafting your own custom harness from start to finish.