Holley EFI Pro Dash 12.3 M8

The Holley EFI Pro Dash 12.3 M8 is a state-of-the-art digital gauge cluster designed for builders and enthusiasts who demand precision engine management and real-time diagnostics in high-performance applications. This touchscreen display integrates seamlessly with Holley's EFI systems, serving as the command center for fuel injection tuning, ignition timing, and engine telemetry on everything from street machines to track-focused builds. Whether you're running a carbureted conversion with modern fuel injection or a fully standalone engine management platform, this display transforms how you monitor and control your power plant.

At its core, the 12.3-inch capacitive touchscreen delivers crisp, daylight-visible graphics with customizable gauge layouts that adapt to your specific engine configuration and driving style. The display connects directly to your Holley ECU via CAN bus communication, eliminating parasitic wiring and enabling real-time boost pressure, air/fuel ratio, coolant temperature, and knock detection data at your fingertips. The M8 controller module processes sensor inputs with intelligent logic, allowing on-the-fly adjustments to fuel curves and timing tables without laptop dependency—a game-changer during dyno pulls or track sessions when quick calibration saves valuable time and fuel.

This system is ideal for EFI-equipped street rods, LS swaps, small-block engine conversions, and dedicated performance platforms where OEM clusters won't cut it. The compact mounting footprint (8.4 x 4.2 inches visible display area) fits modern dash openings or custom bezels, while robust construction withstands vibration and thermal cycling common in modified vehicles. Installation pairs with Holley's comprehensive sensor ecosystem, ensuring full compatibility with oxygen sensors, throttle position switches, and aftermarket fuel pressure regulators—giving you complete visibility into engine behavior that stock gauges simply cannot provide.