3-3/8in P/S II Speedo - Programmable

The 3-3/8in P/S II Speedo – Programmable by Autometer represents a serious upgrade for street machines, restorations, and performance vehicles where accurate speedometer readings and customization matter. This programmable digital speedo is built for enthusiasts who demand more than factory limitations allow—whether you're running a modern engine swap, non-original drivetrain, or custom axle ratio that renders your original gauge inaccurate. The 3-3/8-inch panel-mount design fits most classic and contemporary dash configurations, making it an accessible solution for custom build projects where gauge accuracy directly impacts safety and drivability.

What sets the P/S II platform apart is its programmable functionality—you dial in your exact tire diameter, axle ratio, and transmission calibration directly into the gauge's memory, eliminating the guesswork that plagues swapped or heavily modified vehicles. Autometer's proven electronic design reads speed signals from multiple sources (engine computer, ABS module, or traditional sender) and displays accurate mph or kph on a bright, easy-to-read interface. The compact 0.81 lb gauge resists electrical noise common in high-performance ignition systems, and its robust construction handles the thermal cycling of engine bays without drift or calibration loss—critical when you've invested serious time tuning your build to spec.

Mechanics and builders benefit most from this gauge when integrating crate engines, LS swaps, custom differentials, or oversized wheel-and-tire packages that break stock speedo accuracy. Installation requires only a 12V power source, ground, and a speed signal input—no cutting harnesses or complex wiring. The 6.65 x 5.15 x 7.3-inch footprint allows flexible pod or dash mounting, and Autometer's customer support stands behind calibration questions. Whether you're a restoration shop keeping vintage iron road-legal or a drag racer needing reliable mph confirmation, this programmable speedo delivers the accuracy and flexibility modern builds demand.