Sale

Ignitions and Electrical› Wiring Harnesses

Holley

HARNESS KIT, TPI/STEALTHRAM

$979.95 $898.15 Save $81.80

SKU: H00E 558-503

In Stock
In Stock
Ships by Jun 7
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

An EFI system depends heavily on being supplied a clean and constant voltage source. The grounds of an electrical system are just as important as the power side. Our Holley EFI Harness Kit comes complete with the main harness, power harness and injector harness to support your primary system! Features: Harness Kit Includes: Stealthram/TPI Main Harness, Main Power Harness, V-8 Injector Harness, HEI Ign Harness and Ignition Adapter & Tach Input Simple Installation Works with HP or Dominator ECU's

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandHolley
Part NumberH00E 558-503
Weight4.65 lb

Videos

Holley - EFI Tech: Main Harness Overview

Holley - EFI Tech: Main Harness Overview
Holley Efi Unterminated main harness building from start to finish.

Holley Efi Unterminated main harness building from start to finish.
Holley How To: Install Sniper EFI

Holley How To: Install Sniper EFI

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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