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558-456 Pro Dash Unterminated Input/Output Wiring Harness
InfoVehicle Info Needed
HOLLEYPART NUMBER: 510-558-456

558-456 Pro Dash Unterminated Input/Output Wiring Harness

$29995
1 left in stock
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Wiring Harness
Pro Dash Unterminated Input/Output Wiring Harness
  • 20-Gauge TXL Wire
  • For Holley Pro Dash 510-553-111 and 510-553-112

    Breakdown of Included Items

     

    Features:

    • Fully populates all of the inputs and outputs for Holley Pro Dash 510-553-111 and 510-553-112
    • Can easily be inserted into the existing 34-pin dash connector
    • Crimped TE Superseal pins
    • Color-coded wiring for easy installation
    • Includes additional pins for more than one sensor

    Emissions Note:

    This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

    CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

    • All-in-One Digital Dash Solution

      Holley Digital Dashes will monitor all your vehicle's essential data and offer unparalleled customization. Each model of Digital Dash has a high-resolution screen that is encased in weather-resistant aluminum housing, allowing for multiple mounting configurations to ensure an easy installation. Featuring plug-and-play compatibility with all Holley EFI systems, these unique panels contain a plethora of inputs and outputs for expanded functionality and monitoring.

      Show More

      The Holley EFI Digital Dashes and Accessories are designed for performance enthusiasts who want advanced data monitoring, customizable displays, and seamless integration with modern EFI systems. Built to deliver real-time engine diagnostics and vehicle performance metrics, these digital dash systems transform the way drivers interact with their builds. Whether you’re upgrading a pro-touring muscle car or outfitting a dedicated drag racing machine, Holley EFI Digital Dashes provide the technology and precision required for serious performance applications.

      In high-horsepower builds, accurate data is critical. From monitoring air/fuel ratios to tracking RPM, coolant temperature, boost pressure, and oil pressure, a high-quality digital dash display ensures you have the information needed to protect your investment and optimize performance.

      Performance Benefits & Key Features

      Holley EFI Digital Dashes are engineered with high-resolution screens, customizable gauge layouts, and intuitive interfaces that allow drivers to configure data displays based on specific performance goals. Enthusiasts often prioritize screen size, display clarity, input compatibility, and data logging capability when selecting a digital dash system.

      These digital dashboards integrate directly with Holley EFI systems and other compatible engine management platforms, delivering real-time performance data with precision. Advanced features may include programmable warning indicators, shift lights, multi-page displays, and data recording for post-run analysis. For turbocharged or supercharged applications, monitoring boost levels and engine parameters is essential for maintaining optimal torque capacity and safe operation.

      Constructed with durable housings and high-quality internal components, Holley EFI Digital Dashes are built to withstand the vibration and demands of high-performance driving. They are ideal for street performance builds, autocross cars, drag racing vehicles, and custom restomod projects seeking modern instrumentation.

      Fitment, Compatibility & Applications

      Holley EFI Digital Dashes and Accessories are compatible with a wide range of GM, Ford, and Mopar platforms equipped with Holley EFI or supported engine management systems. Popular applications include LS-swapped Camaro and Chevelle builds, Coyote-powered Mustangs, HEMI conversions, and performance trucks.

      These digital dash systems are well-suited for classic muscle cars transitioning from analog gauges to modern electronic displays. With versatile mounting options and configurable layouts, they integrate seamlessly into custom interiors and race-ready cockpits.

      If you’re ready to modernize your cockpit with advanced performance monitoring, explore the Holley EFI Digital Dashes and Accessories at JEGS and equip your build with race-inspired data control designed for today’s high-performance enthusiasts.

    Part TypeInstrument Panel Wiring Harness
    Product LineHolley EFI Digital Dashes and Accessories
    BrandHOLLEY
    Package Height4.0
    Package Width11.0
    Package Length11.0
    Weight2.875 PG
    Part CategoryPerformance Parts
    ColorMulti-Color
    Terminal TypePin
    QuantitySold as a kit
    Product Length10 ft.
    Part FitmentSemi Universal
    Package Qty1
    Package TypeEA
    Some parts are not legal for use in California or other states with similar laws / regulations
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