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Home Wiring and Accessories Holley EFI Engine Wiring Harness 558-134
Special Order
Holley EFI Engine Wiring Harness 558-134
Holley EFI Engine Wiring Harness 558-134
Holley EFI Engine Wiring Harness 558-134
Holley EFI Engine Wiring Harness 558-134
Holley EFI Engine Wiring Harness 558-134
Holley EFI Engine Wiring Harness 558-134
  1. Holley EFI Engine Wiring Harness 558-134
  2. Holley EFI Engine Wiring Harness 558-134
  3. Holley EFI Engine Wiring Harness 558-134
  4. Holley EFI Engine Wiring Harness 558-134
  5. Holley EFI Engine Wiring Harness 558-134
  6. Holley EFI Engine Wiring Harness 558-134

Holley EFI Engine Wiring Harness 558-134

HOL558-134
OUT OF STOCK, Please contact us for availability BEFORE ordering. This is a SPECIAL ORDER part. This item can be brought in either with a stock order or on it’s own. Contact us today to discuss available options.

$700.75

Holley EFI Engine Wiring Harness

558-134

EXTENDED LENGTH 58X LS MAIN HARNESS;58x;;LS2/3/7+ (58x/4x) Engine Main Harness Extended Length;LS2/3/7+ (58x/4x) Engine Main Harness for HP EFI & Dominator EFI;These harnesses are designed to fit most 24x and 58x LS engines, from 1997-2012. They are a perfect fit for installers wanting to mount the any Holley EFI ECU inside of the passenger compartment where it is away from the elements, and easy to access.;Plug and play with Dominator, HP, Terminator X and Terminator X Max ECUs;Designed for use on 24x / 1x and 58x / 4x LS engines;22" Extended length allows you to mount the ECU in a wide variety of locations, such as on a roll bar, or under the passenger seat

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Through our distribution network Deliveries can be as fast as Next Day Delivery.
Delivery times vary by destination, tracking information is provided with every purchase.

Get it Installed

JB's Power Centre offers on-site professional installation services in Calgary and Edmonton, AB.
We have on staff licensed Mechanical Technicians as well as MECP Certified 12-Volt Technicians.

* Extend your products Manufacturer Warranty

All products include a manufacturer warranty, but you can extend this warranty with
JB's Purchase Protection Plan
*Available on select products.