Exterior Components› Body Panels and Components
Holley
Ford TFI Ignition Harness
SKU: H00E 558-305
Moderate — 2–4 hours
Description
It facilitates the necessary wiring to ensure proper communication between the distributor and the EFI controller. The harness is specifically built to work with all Ford TFI ignitions when paired with Holley's compatible EFI systems.
Fitment
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Available on iOS & Android
Specifications
| Brand | Holley |
| Part Number | H00E 558-305 |
| Weight | 0.4 lb |
Videos
Terminator X EFI for Ford Part 1: Sensors And Relay Wiring
The OG is back! Fox Body Mustang Holley Terminator X Kit - Overview & Full Explanation (550-937F)
How To Install a Holley Dual Sync Distributor and MSD Box on a Terminator X Foxbody Mustang
Foxbody Mustang Holley Terminator X Install
Sniper EFI HyperSpark Ready-To-Run Distributors Add Timing Control For Holley EFI Systems
Foxbody Mustang Holley Terminator X Tips: Setup and First Drive
Terminator X for Ford Part 2: MSD Pro 600 & Cam Sync on Small Block Ford
HOW TO INSTALL MSD BOX WITH HOLLEY TERMINATOR X ON A '79-'93 FOXBODY MUSTANG
HyperSpark Ignition Buyers Guide - Everything You Need To Know
Holley Dual Sync Setup On Terminator X - Fox body Mustang | Project Coupe
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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