Description

EFI Wiring Harness – J1A/B – Holley Dominator EFI – Each

Why Choose Us?



Frequently Asked Questions​

As an Authorized Automotive Retailer in the United States, we take pride in guaranteeing 100% authentic products from all brands available on our website. With partnerships spanning 1,000+ brands and a network of 20+ distributor warehouses nationwide, we maintain millions of auto parts in inventory across the USA, ensuring quick shipping and reliable service to our customers. When you shop with us, you're investing in quality and trust.
We believe we have the fastest backorder system in the U.S. auto parts industry, thanks to our strong partnerships with brands and vendors. Nearly all backordered auto parts are shipped directly by the vendors without any additional delays, or they are placed as special orders on the same day. In most cases, backordered parts are delivered within 5-10 days.
We offer unbeatable prices and the best shipping rates on auto parts, with exclusive protection and insurance included to safeguard your order from damage or loss. Enjoy convenient door-to-door delivery, real-time tracking, and our 100% satisfaction guarantee for a smooth, worry-free experience.
Our standard shipping typically takes 1-3 business days. We will provide estimated shipping time for each product. While we aim to deliver as quickly as possible, this timeframe ensures all orders are processed, prepared, and dispatched with care. If the products are not ready for shipping in 72 hours, we will refund you 100%
Absolutely. Once your order is dispatched, you’ll receive an email with tracking details, so you can follow your shipment every step of the way. Every step of shipping process will be sent through email notifications or using tracking page.
Every product page includes a stock level indicator to show what’s available. We always update the inventory 24/24. We’ll be happy to check availability and provide updates on new stock arrivals if you need a help.
We’re sorry to hear that your order wasn’t delivered in perfect condition. Please email us with your order number, a description of the issue, and photographs of the damaged item. Once we receive this information, we’ll arrange for a replacement or refund and handle the return process.
You can return items within 30 days of receipt. Ensure the product is new in its original packaging and securely wrapped for safe transit. Once we receive the item in sellable condition, we’ll issue a full refund for the product value. Contact us for the return address and further instructions.

About HOLLEY

A leader in fuel systems for over 100 years, Holley fuel management systems have powered top circle track and drag racing teams around the world. Now, Holley offers EFI systems for GM's LS engine, among many other applications. Holley's products also include performance fuel pumps, intake manifolds, and engine accessories products for street performance, race, and marine applications.

International Shipping

Below are estimated rates and delivery times for popular destinations; full carrier options are available at checkout.

Our dedicated team has years of experience managing international logistics and customs documentation to ensure smooth delivery from our US warehouse to your door. Please review our shipping policy and local import regulations before ordering.

Loading international estimates...

Reviews

There are no reviews yet.

Be the first to review “HOLLEY J1A/B Input/Output Connector 558-400”

Your email address will not be published. Required fields are marked *

Recently viewed products

  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    PERTRONIX IGNITION Ignitor II Conversion Kit 91361A

    SKU: PRT91361A
    Product information
    • Weight0.31 lbs
    • Dimensions6.15 × 4.8 × 1.55 in
    • Product Line

      Ignitor II

    • Quantity

      Kit

    • Trigger Method

      Magnetic

    • Voltage

      12V

    • Positive / Negative Ground

      Negative

    Details...
    Original price was: $230.00.Current price is: $208.60.Add to cart
    Original price was: $230.00.Current price is: $208.60.
    Quantity Only 8 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    JAZ 14in Triangular Funnel 550-014-06

    SKU: JAZ550-014-06
    Product information
    • Weight1.08 lbs
    • Dimensions17.5 × 12.1 × 11.2 in
    • Material

      Plastic

    • Color

      Red

    • Finish

      Natural

    • Quantity

      Each

    • Shape

      Triangle

    Details...
    Original price was: $27.82.Current price is: $25.29.Add to cart
    Original price was: $27.82.Current price is: $25.29.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    TCI Glide Trans Shield-Blue 970005

    SKU: TCI970005
    Product information
    • Weight9.153 lbs
    • Dimensions15.3 × 12.7 × 12.3 in
    • Style

      Transmission Case

    • Material

      Aluminum

    • Color

      Blue

    • Finish

      Powder Coat

    • Quantity

      Each

    Details...
    Original price was: $182.00.Current price is: $164.95.Add to cart
    Original price was: $182.00.Current price is: $164.95.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    TRANS-DAPT 5/16 Hex Header Bolts 4900

    SKU: TRA4900
    Product information
    • Weight0.34 lbs
    • Dimensions3.6 × 2.7 × 1.25 in
    • Quantity

      Set of 12

    • Material

      Steel

    • Color

      Black

    • Finish

      Oxide

    • Bolt/Stud

      Bolt

    Details...
    Original price was: $5.60.Current price is: $5.09.Add to cart
    Original price was: $5.60.Current price is: $5.09.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    WEATHERTECH No Drill MudFlaps 110137

    SKU: WEA110137
    Product information
    • Weight1.12 lbs
    • Dimensions21.8 × 13.5 × 4.6 in
    • Product Line

      DigitalFit

    • Application Specific

      Yes

    • Material

      Plastic

    • Color

      Black

    • Finish

      Natural

    Details...
    Original price was: $104.00.Current price is: $93.95.Add to cart
    Original price was: $104.00.Current price is: $93.95.Add to wishlist
  • Add to wishlist
    Sale
    FiTECH FUEL INJECTION FiTech Oxygen Sensor 60017
    Add to wishlist

    FiTECH FUEL INJECTION FiTech Oxygen Sensor 60017

    SKU: FIT60017
    Product information
    • Weight0.285 lbs
    • Dimensions7.75 × 4.95 × 1.6 in
    • Quantity

      Each

    • Mounting Style

      Screw-In

    • Style

      FiTech Ultimate LS

    • Cat3.5

      Oxygen Sensors

    • Narrowband / Wideband

      Wideband

    Details...
    Original price was: $123.00.Current price is: $111.00.Add to cart
    Original price was: $123.00.Current price is: $111.00.Add to wishlist
  • Add to wishlist
    Sale
    FIDANZA ENGINEERING Flywheel Insert Plate 229501
    Add to wishlist

    FIDANZA ENGINEERING Flywheel Insert Plate 229501

    SKU: FID229501
    Product information
    • Weight2.07 lbs
    • Dimensions10.05 × 10 × 0.85 in
    • Material

      Steel

    • Color

      Natural

    • Finish

      Natural

    • Quantity

      Each

    • Component Type

      Friction Insert

    Details...
    Original price was: $88.07.Current price is: $80.06.Add to cart
    Original price was: $88.07.Current price is: $80.06.
    Quantity Only 3 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    DYNOMAX Hardware - Connector - Y 41356
    Add to wishlist

    DYNOMAX Hardware – Connector – Y 41356

    SKU: DYN41356
    Product information
    • Weight1.595 lbs
    • Dimensions11.9 × 4.7 × 2.15 in
    • Inlet Diameter

      1-7/8 in

    • Outlet Diameter

      1-7/8 in

    • Length

      12 in

    • Weld On / Clamp On

      Weld On, Clamp On

    • Material

      Steel

    Details...
    Original price was: $32.20.Current price is: $29.27.Add to cart
    Original price was: $32.20.Current price is: $29.27.
    Quantity Only 1 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    DANA - SPICER Differential Case Assembly 80754
    Add to wishlist

    DANA – SPICER Differential Case Assembly 80754

    SKU: DAN80754
    Product information
    • Weight25.8 lbs
    • Dimensions11.3 × 10.6 × 9.5 in
    • Product Line

      Trac-Lok

    • Material

      Steel

    • Color

      Natural

    • Finish

      Natural

    • Quantity

      Each

    Details...
    Original price was: $727.19.Current price is: $605.99.Add to cart
    Original price was: $727.19.Current price is: $605.99.Add to wishlist
  • Add to wishlist
    Sale
    CHASSIS ENGINEERING Mustang Mini Tub Kit C/E3687
    Add to wishlist

    CHASSIS ENGINEERING Mustang Mini Tub Kit C/E3687

    SKU: CCE3687
    Product information
    • Weight25.2 lbs
    • Dimensions49.8 × 25.6 × 2 in
    • Width

      8.75 in

    • Material

      Steel

    • Color

      Natural

    • Finish

      Natural

    • Quantity

      Pair

    Details...
    Original price was: $229.94.Current price is: $199.95.Add to cart
    Original price was: $229.94.Current price is: $199.95.Add to wishlist

    26