Description

EFI Wiring Harness – Ignition Adapter Harness – GM Small Cap HEI Distributor to Holley Avenger / HP / 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.

Global Shipping Estimates (Ships from USA)

Destination Region Est. Delivery Time Estimated Cost
🇨🇦 Canada 5 - 7 Days
DHL UPS USPS FedEx
From $50.00 USD
🇪🇺 European Countries 5 - 7 Days
DHL UPS USPS FedEx
From $70.00 USD
🇦🇺 Australia 5 - 7 Days
DHL UPS USPS FedEx
From $110.00 USD
🇦🇪 United Arab Emirates 5 - 7 Days
DHL UPS USPS FedEx
From $100.00 USD
🇸🇦 Saudi Arabia 5 - 7 Days
DHL UPS USPS FedEx
From $100.00 USD
🇯🇵 Asia Countries 5 - 7 Days
DHL UPS USPS FedEx
From $130.00 USD
*Note: These are estimated costs for a standard package. Exact shipping fees will be calculated at checkout using live rates based on your specific location and cart weight.

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.

Reviews

There are no reviews yet.

Be the first to review “HOLLEY HEI Ignition Harness 558-304”

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

    SPC PERFORMANCE Chrysler/Dodge Ez Arm 67018

    SKU: SPP67018
    Product information
    Details...
    Original price was: $135.41.Current price is: $123.10.Add to cart
    Original price was: $135.41.Current price is: $123.10.
    Quantity Only 1 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    PEM Premium Quick Change Gears 65027

    SKU: PEM65027
    Product information
    • Weight4.7 lbs
    • Dimensions8.4 × 5 × 1.6 in
    • Product Line

      Premium

    • Lightweight

      Yes

    • Spline

      10.0

    • Set Number

      27

    • Gear 1 Tooth Count

      22.0

    Details...
    Original price was: $176.21.Current price is: $160.19.Add to cart
    Original price was: $176.21.Current price is: $160.19.
    Quantity Only 4 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    QA1 Proma-Star C/O Shock – Adjustable DS502

    SKU: QA1DS502
    Product information
    • Weight4.21 lbs
    • Dimensions19.1 × 3.9 × 3.6 in
    • Product Line

      Proma Star Single Adjustable

    • Quantity

      Each

    • Variant

      Yes

    • Variant Group

      Shocks72

    • Variant Column

      Extended Length,Compressed Length

    Details...
    Original price was: $258.45.Current price is: $234.95.Add to cart
    Original price was: $258.45.Current price is: $234.95.Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    VENTSHADE 97′ Venture Ventvisor 92335

    SKU: VEN92335
    Product information
    • Weight2.43 lbs
    • Dimensions47 × 12 × 2 in
    • Product Line

      Original Ventvisor

    • Application Specific

      Yes

    • Mounting Style

      Stick-On

    • In Channel / Out Of Channel

      Out of Channel

    • Front Included

      Yes

    Details...
    Original price was: $55.00.Current price is: $49.99.Add to cart
    Original price was: $55.00.Current price is: $49.99.
    Quantity Only 7 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    Wheel Front Aftermarket Shop
    Add to wishlist

    G-FORCE Suit GF125 Child Medium Red 4125CMDRD

    SKU: GFR4125CMDRD
    Product information
    • Weight2.357 lbs
    • Dimensions15.75 × 12 × 4 in
    • Product Line

      GF125

    • Size

      Youth Medium

    • Sfi Rating

      3.2A/1

    • Layers

      1 Layer

    • Color

      Red

    Details...
    Original price was: $136.85.Current price is: $119.00.Add to cart
    Original price was: $136.85.Current price is: $119.00.
    Quantity Only 2 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    COMP CAMS Top Dead Center Stop - Deck Plate Sytle 4933CPG
    Add to wishlist

    COMP CAMS Top Dead Center Stop – Deck Plate Sytle 4933CPG

    SKU: COM4933
    Product information
    • Weight0.55 lbs
    • Dimensions12.65 × 3.75 × 1.65 in
    • Adjustable

      Yes

    • Quantity

      Each

    • Head On / Head Off

      Head Off

    • Thread A Size

      5/16-24 in

    • Slotted

      Yes

    Details...
    Original price was: $26.39.Current price is: $22.95.Add to cart
    Original price was: $26.39.Current price is: $22.95.Add to wishlist
  • Add to wishlist
    Sale
    B and M AUTOMOTIVE Micro Switch 80629
    Add to wishlist

    B and M AUTOMOTIVE Micro Switch 80629

    SKU: BMM80629
    Product information
    • Weight0.045 lbs
    • Dimensions7.15 × 6.4 × 0.5 in
    • Material

      Plastic

    • Color

      Black

    • Finish

      Natural

    • Quantity

      Each

    • Hardware Included

      Yes

    Details...
    Original price was: $20.00.Current price is: $17.98.Add to cart
    Original price was: $20.00.Current price is: $17.98.Add to wishlist
  • Add to wishlist
    Sale
    BELL HELMETS Black Side Air Insert for BR1 Std Nozzle 2070038
    Add to wishlist

    BELL HELMETS Black Side Air Insert for BR1 Std Nozzle 2070038

    SKU: BEL2070038
    Product information
    • Weight0.1 lbs
    • Dimensions5.45 × 4.1 × 2.15 in
    • Color

      Black

    • Quantity

      Kit

    • Finish

      Natural

    • Mounting Location

      Side Mount

    • Mounting Method

      Screw-On

    Details...
    Original price was: $57.44.Current price is: $49.95.Read more
    Original price was: $57.44.Current price is: $49.95.Add to wishlist
  • Add to wishlist
    Sale
    BAER BRAKES Complete Front Brake System 4301432R
    Add to wishlist

    BAER BRAKES Complete Front Brake System 4301432R

    SKU: BAE4301432R
    Product information
    • Weight46 lbs
    • Dimensions15.5 × 15.5 × 15.5 in
    • Quantity

      Kit

    • Variant

      Yes

    • Product Line

      SS4+

    • Wheel Studs Included

      Yes

    • Front/Rear

      Front

    Details...
    Original price was: $1,534.00.Current price is: $1,393.95.Add to cart
    Original price was: $1,534.00.Current price is: $1,393.95.
    Quantity Only 1 left in stock!
    -+
    Add to cart
    Add to wishlist
  • Add to wishlist
    Sale
    AUTOMETER 2-1/16in C/S 2000 Degree Pyrometer 6145
    Add to wishlist

    AUTOMETER 2-1/16in C/S 2000 Degree Pyrometer 6145

    SKU: ATM6145
    Product information
    • Weight0.885 lbs
    • Dimensions5.6 × 5.6 × 5.3 in
    • Product Line

      Cobalt

    • Gauge Type

      Pyrometer

    • Gauge Diameter (In)

      2-1/16 in

    • Gauge Diameter (Mm)

      52.4 mm

    • Mechanical/Electric

      Electric

    Details...
    Original price was: $283.76.Current price is: $257.96.Add to cart
    Original price was: $283.76.Current price is: $257.96.
    Quantity Only 3 left in stock!
    -+
    Add to cart
    Add to wishlist

    43