Digital Dash I/O Adapter w/Unterminated Vehicle Harness
Type: Digital Dash Harness / Adapter / Module

I/O Adapter w/Unterminated Vehicle Harness
Features:
- Provides (10) addiitonal inputs/outputs to the 7" digital dash
- Brings out connections to a waterproof 26 pin connector similiar to ones used on EFI units
- Includes USB memory stick to update digital dash firmware that supports adapter
- Part number for Digital Dash I/O Adapter 558-432
Specs:
- Brand: Holley EFI
- Category: Electrical, Lighting and Body
- Emission Code: 5
- Part Type: Dashboard Wiring Harness
- Product Type: Digital Dash Harness / Adapter / Module
- Sub Category: Wire, Cable and Related Components
Tech Resources:
A USB memory stick has been provided to update your digital dash with the firmware that supports the I/O adapter. This update will replace all your screens with the factory standalone default. To update, turn off the dash, plug in the USB stick, and power on. Do not remove power until after the update is complete. Pictures are representive as they have the terminated ends, this item does not.
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Important Notices
- Off‑Road Use Only
Products sold by JS Speed are intended for off‑road use and may be illegal on public roads where emissions or pollution‑control laws apply. - Check Local Laws
Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area. - Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.





