Name: Wheel Front Ltd. Liability Company
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HOLLEY CAN Extension Harness 8ft Length 558-425
SKU: HLY558-425
Product information
Weight0.25 lbs
Dimensions4.9 × 4.4 × 3.3 in
Harness Purpose
CAN Extension Harness

Loom / Sleeve Included
Yes

Quantity
Each

Length
8 ft

Terminated
Yes

Details...
Original price was: $67.00.Current price is: $60.74.Add to cart

Original price was: $67.00.Current price is: $60.74.
Quantity Only 6 left in stock!
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HOLLEY Wire Harness Kit – EFI Terminator I/O 558-420
SKU: HLY558-420
Product information
Weight0.65 lbs
Dimensions4.8 × 4.4 × 3.2 in
Harness End 1
Connector Pins

Harness End 2
Wire Ends

Harness Purpose
Terminator Input / Output Harness

Quantity
Each

Unassembled
Yes

Details...
Original price was: $54.00.Current price is: $48.65.Add to cart

Original price was: $54.00.Current price is: $48.65.
Quantity Only 6 left in stock!
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HOLLEY Map Sensor Adapter LS1 & LS2 to LS3 558-416
SKU: HLY558-416
Product information
Weight0.11 lbs
Dimensions4.8 × 2.35 × 2.35 in
Harness Purpose
MAP Sensor Adapter

Loom / Sleeve Included
Yes

Quantity
Each

Terminated
Yes

Note
Plug and play adapter for allow installation of an LS3 MAP sensor in an LS1 or LS2 equipped vehicle.

Details...
Original price was: $41.00.Current price is: $37.10.Add to cart

Original price was: $41.00.Current price is: $37.10.
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HOLLEY Sealed USB Cable 558-409
SKU: HLY558-409
Product information
Weight0.3 lbs
Dimensions4.9 × 4.5 × 3.2 in
Harness Purpose
Data Transfer Cable

Quantity
Each

Variant
Yes

Finish
Rubber Coated

Color
Black

Details...
Original price was: $94.00.Current price is: $85.04.Add to cart

Original price was: $94.00.Current price is: $85.04.
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HOLLEY Connector & Pin Kit J2A/J2B/J3/J4 558-408
SKU: HLY558-408
Product information
Weight0.45 lbs
Dimensions7.7 × 3.4 × 2.3 in
Quantity
Kit

Product Line
Holley Dominator EFI

Housing Style
J2A, J2B, J3, J4

Housing 1 Quantity
4.0

Housing 1 Pin Quantity
26 Pin

Details...
Original price was: $223.00.Current price is: $202.45.Add to cart

Original price was: $223.00.Current price is: $202.45.
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HOLLEY Multi Map Selector 558-407
SKU: HLY558-407
Product information
Weight0.37 lbs
Dimensions4.75 × 4.35 × 2.35 in
Quantity
Kit

Intended Application
ECM Calibration

Material
Plastic

Finish
Natural

Activation Method
Rotary

Details...
Original price was: $176.00.Current price is: $159.25.Add to cart

Original price was: $176.00.Current price is: $159.25.
Quantity Only 3 left in stock!
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HOLLEY Drive By Wire Harness GM 558-406
SKU: HLY558-406
Product information
Weight1.13 lbs
Dimensions10.6 × 10.5 × 2.3 in
Harness Purpose
Drive-By-Wire

Loom / Sleeve Included
Yes

Quantity
Each

Terminated
Yes

Note
Dominator EFI GM drive by wire harness.

Details...
Original price was: $248.00.Current price is: $224.95.Add to cart

Original price was: $248.00.Current price is: $224.95.
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HOLLEY Trans Wire Harness GM 4L60 Pre 2009 – 4L80 558-405
SKU: HLY558-405
Product information
Weight1.75 lbs
Dimensions12.55 × 9.4 × 3.8 in
Harness Purpose
Transmission

Loom / Sleeve Included
Yes

Quantity
Each

Terminated
Yes

Note
Works in conjunction with Holley Dominator EFI systems only.

Details...
Original price was: $304.00.Current price is: $276.25.Add to cart

Original price was: $304.00.Current price is: $276.25.
Quantity Only 3 left in stock!
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HOLLEY J4 Connector & Harness 558-404
SKU: HLY558-404
Product information
Weight1.95 lbs
Dimensions10.6 × 10.4 × 2.2 in
Harness End 1
J4 Male Plug

Harness End 2
Connector Pins

Harness Purpose
Auxiliary Harness

Quantity
Each

Plug Seals Included
Yes

Details...
Original price was: $228.00.Current price is: $206.95.Add to cart

Original price was: $228.00.Current price is: $206.95.
Quantity Only 6 left in stock!
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HOLLEY J3 Connector & Harness 558-403
SKU: HLY558-403
Product information
Weight1.4 lbs
Dimensions11 × 10.5 × 2.2 in
Harness End 1
J3 ECU Male Plug

Harness End 2
Connector Pins

Harness Purpose
Auxiliary Harness

Quantity
Each

Plug Seals Included
Yes

Details...
Original price was: $179.00.Current price is: $161.95.Add to cart

Original price was: $179.00.Current price is: $161.95.
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HOLLEY J2B Auxiliary Harness Kit 558-402
SKU: HLY558-402
Product information
Weight1.35 lbs
Dimensions10.7 × 10.4 × 2.2 in
Harness Purpose
Auxiliary

Quantity
Kit

Note
Includes J2B ECU connector, four additional injector driver outputs, four additional coil driver outputs, and 23 user programmable outputs.

Fuel Injection Type
EFI

UPC Code
90127666432

Details...
Original price was: $179.00.Current price is: $161.95.Add to cart

Original price was: $179.00.Current price is: $161.95.
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HOLLEY Auxiliary Harness J2A Connector 558-401
SKU: HLY558-401
Product information
Weight2.25 lbs
Dimensions10.7 × 10.5 × 2.2 in
Harness Purpose
Auxiliary

Quantity
Kit

Terminated
Yes

Note
Includes J2A ECU connector, wide band oxygen sensor harness, and 23 programmable input loose wire with pins.

Fuel Injection Type
MFI

Details...
Original price was: $232.00.Current price is: $210.55.Add to cart

Original price was: $232.00.Current price is: $210.55.
Quantity Only 9 left in stock!
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HOLLEY J1A/B Input/Output Connector 558-400
SKU: HLY558-400
Product information
Weight1.03 lbs
Dimensions10.7 × 10.4 × 2.2 in
Harness Purpose
Auxiliary

Quantity
Each

Terminated
Yes

Fuel Injection Type
MFI

Metering Style
Speed Density, Speed Throttle

Details...
Original price was: $130.00.Current price is: $117.85.Add to cart

Original price was: $130.00.Current price is: $117.85.
Quantity Only 7 left in stock!
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HOLLEY Pro Billet/Crank Trigger to Sniper 2 558-330
SKU: HLY558-330
Product information
Weight0.1 lbs
Dimensions3.8 × 3.3 × 2.4 in
Quantity
Each

Product Line
Sniper 2 EFI

Intended Application
Tach Input Ignition Adapter

Side 1 Connection Style
Male Plug

Side 2 Connection Style
Male Plug

Details...
Original price was: $29.00.Current price is: $26.14.Add to cart

Original price was: $29.00.Current price is: $26.14.
Quantity Only 2 left in stock!
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HOLLEY CD Box to Sniper 2 558-329
SKU: HLY558-329
Product information
Weight0.1 lbs
Dimensions3.8 × 3.35 × 2.35 in
Quantity
Each

Product Line
Sniper 2 EFI

Intended Application
Tach Input Ignition Adapter

Side 1 Connection Style
Male Plug

Side 2 Connection Style
Wire Ends

Details...
Original price was: $29.00.Current price is: $25.84.Add to cart

Original price was: $29.00.Current price is: $25.84.
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HOLLEY LS Coil Ext. Harness 36in 2pk 558-326
SKU: HLY558-326
Product information
Weight0.5 lbs
Dimensions7 × 3.5 × 2.3 in
Harness End 1
Stock Harness

Harness End 2
Ignition Coil

Harness Purpose
Extension Harness

Loom / Sleeve Included
Yes

Quantity
Pair

Details...
Original price was: $129.00.Current price is: $116.95.Add to cart

Original price was: $129.00.Current price is: $116.95.
Quantity Only 2 left in stock!
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Frequently Asked Questions

What sets Wheel Front Shop apart from the rest?

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.

How fast do we process backorders for auto parts?

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 10-14 days. Shop with Confidence Commitment: If we cannot fulfill your backorder within 30 days, Wheel Front will issue a full refund—no hidden fees, no hassle, and no questions asked. Because your trust matters, we're committed to making every purchase simple, transparent, and worry-free.

Why Choose Our International Shipping?

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.

How long does shipping take?

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%

Can I track my order?

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.

Do you have my product in stock?

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.

My goods arrived damaged, what should I do?

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.

How do I return an order?

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.

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