3-3/8 S/C GPS Speedo w/Rally-Nav Display

The AutoMeter 3-3/8" Sport-Comp GPS Speedometer with Rally-Nav Display (model 3982) combines traditional analog gauge design with modern GPS tracking technology, delivering accurate speed measurement for high-performance applications. This 140 MPH electric speedometer integrates real-time GPS data with a black face analog display in a compact 3-3/8-inch diameter housing, making it ideal for autocross, track days, rally events, and street performance vehicles where precise speed monitoring is essential.

The GPS-based speed calculation eliminates mechanical cable wear and provides accuracy independent of tire diameter changes—a critical advantage in competitive driving where suspension and wheel modifications are common. The 140 MPH range covers street and entry-level track performance, while the Rally-Nav display function allows dual data readout, enabling drivers to monitor both instantaneous speed and trip navigation simultaneously. The analog gauge provides immediate visual feedback without requiring attention to digital screens, maintaining the driver's focus on road conditions during dynamic driving situations.

This speedometer suits enthusiasts running modified vehicles, rally competitors, autocross drivers, and track-focused builds where OEM speedometer accuracy may be compromised by non-stock wheel sizes or gear ratios. The GPS-tracked data eliminates guesswork about true speed versus tire-size-dependent error, providing consistent readings across different vehicles and setups. Installation into existing dash openings designed for 3-3/8-inch gauges keeps fabrication minimal while upgrading capability beyond conventional cable or electronic speed sensors.

AutoMeter's Sport-Comp line is recognized for dashboard integration across performance platforms, and GPS-equipped models address the growing demand for data-accurate speed monitoring in amateur racing and high-performance street applications where traditional speedo calibration falls short after modifications.