Holley Fuel Injection Harness 558-121; Main Harness

Price:	$470.95

Brand:

Holley

SKU:

HOL558-121

UPC:

090127009239

Box Dimensions:

14 × 14 × 5 in

Box Weight:

4 lb

This item ships free with qualifying orders of $150 or more

(Valid on orders shipped within the contiguous United States. Excludes any oversized charges. See Shipping Policy page for more details)

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Description & Specs

Series:

Main Harness

Quantity:

Sold As Each

2x4 Side Mount
Provides The Great Looks Of A Classic Holley 4150 Carb
Multiple Color Options Allows For Any EFI System To Be Upgraded
Plug and Play Main Harness Provides A Clean Finished Appearance
Allows For Quick Install
Laptop Tuning Is Required With This Upgrade
We Recommend Taking To Certified Holley EFI Tuner/Installer

Introducing 2x4 Terminator Stealth EFI upgrade components. The wait is over. These upgrade components allow you to use your current Terminator Stealth EFI throttle body, install a new main harness, and slave throttle body, and you are finished. This upgrade is also perfect for anyone wanting to convert their 2x4 supercharged combo over to Electronic Fuel Injection!

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