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Digital Dash I/O Adapter w/Terminated Vehicle Harness

Digital Dash I/O Adapter with terminated Vehicle Harness

PART# 558-434

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$272.00   Suggested Retail
$219.56   Holleydays Price
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I/O Adapter w/Terminated Vehicle Harness


  • Provides ten addiitonal inputs/outputs to the 7" digital dash
  • Brings out connections to a waterproof 26 pin connector similiar to ones used on EFI units
  • Harness includes USB memory stick to update digital dash firmware that supports adapter


BrandHolley EFI
Emission Code5
Product TypeDigital Dash Harness / Adapter / Module
Part Number558-434



This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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        Some parts are not legal for use in California or other states with similar regulations.

         X  Holleydays 2020 20% off and DD
         X  Holleydays 2020 20% off and DD