Home / Shop / Holley EFI Digital Dash I/O Adapter with Wiring Harness Kits 558-434 Data Acquistion Harnesses, EFI, and Terminated Vehicle Harness, for 7 in. Dash, USB Memory Stick Included, Kit

Holley EFI Digital Dash I/O Adapter with Wiring Harness Kits 558-434 Data Acquistion Harnesses, EFI, and Terminated Vehicle Harness, for 7 in. Dash, USB Memory Stick Included, Kit

SKU: HLY558-434

Data Acquisition Wiring Harnesses

Holley

Holley EFI Digital Dash I/O Adapter with Wiring Harness Kits 558-434 Data Acquistion Harnesses, EFI, and Terminated Vehicle Harness, for 7 in. Dash, USB Memory Stick Included, Kit

SKU: HLY558-434

Data Acquisition Wiring Harnesses

IN STOCK! Est Ship 4-7 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.

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Description

Holley EFI Digital Dash I/O adapter with wiring harness kits offer more performance from your digital dash. Available terminated or unterminated, these vehicle harnesses provide 10 additional inputs/outputs to your 7 in. unit. They can be configured for gauges or switches and data-logged locally through your digital dash. The adapters bring out connections to a waterproof 26-pin connector, similar to ones used on EFI units, and the kits include a USB memory stick to update digital dash firmware that supports the adapter.

Part Type

Data Acquisition Wiring Harnesses

Data: v4.2 - Upd: 2026-10-13 18:48:05

Specifications

Product Attributes - Brand: Holley
Product Attributes - Manufacturer's Part Number: 558-434
Product Attributes - Part Type: Data Acquisition Wiring Harnesses
Product Attributes - Product Line: Holley EFI Digital Dash I/O Adapter with Wiring Harness Kits
Product Attributes - UPC: 090127734407
Product Attributes - Quantity: Sold as a kit.
Product Attributes - Notes: For Holley 7 in. digital dash. Includes terminated vehicle harness. Includes USB memory stick for updating firmware. Comes with an adapter harness so that early or late MAP sensors will plug in.

Reference Information

Brand Name/s	Holley
StreetFX SKU	hly558-434
SFX Item ID	4782390
Supplier Item Code	4782390
Manufacturer SKU	558-434
Manufacturer UPC	90127734407
Alternative References	HOL558-434

Compatibility

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Holley EFI Digital Dash I/O Adapter with Wiring Harness Kits 558-434 Data Acquistion Harnesses, EFI, and Terminated Vehicle Harness, for 7 in. Dash, USB Memory Stick Included, Kit

Holley EFI Digital Dash I/O Adapter with Wiring Harness Kits 558-434 Data Acquistion Harnesses, EFI, and Terminated Vehicle Harness, for 7 in. Dash, USB Memory Stick Included, Kit

Description

Part Type

Specifications

Reference Information

Compatibility

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