3-3/4in DG/B In-Dash Tachometer

The AutoMeter 3-3/4in DG/B In-Dash Tachometer (Model 6399) is a precision engine monitoring instrument designed for automotive enthusiasts and custom builders who require accurate RPM feedback. This tachometer is essential for tuning carbureted classics, managing high-performance turbo builds, or fine-tuning fuel injection parameters, ensuring optimal engine performance and protection against over-rev conditions.

Featuring a traditional analog needle sweep combined with a digital readout, this tachometer provides both visual feedback and precise numerical RPM data. Its robust construction is designed to withstand vibration and temperature fluctuations, making it reliable for high-output alternators without signal drift. The standard 3-3/4-inch dial format allows for straightforward installation in most vehicles from the 1960s to the 1980s.

Ideal for street rodders, vintage muscle car restorers, and engine builders working on carb or EFI conversions, this tachometer is a dependable aftermarket solution for those upgrading beyond OEM gauge clusters. Its compatibility with various ignition systems, including points and electronic setups, makes it a versatile choice for a wide range of applications.