G/Stock Tachometer 2-5/8 Full Sweep

The G/Stock Tachometer 2-5/8 Full Sweep from Classic Instruments is purpose-built for engine builders, restoration enthusiasts, and performance mechanics who demand reliable RPM measurement in street rods, muscle cars, and vintage restorations. This electrically-driven gauge delivers accurate real-time engine speed feedback—critical for tuning carburetor response, validating ignition timing, and monitoring engine health during break-in and dyno testing. The full sweep design means the needle travels the complete arc from zero to redline, giving you maximum visual feedback at a glance from the driver's seat.

Classic Instruments engineered this tachometer with a 2-5/8 inch dial face—a compact footprint that fits standard dash openings without modification while maintaining excellent readability. The full sweep mechanism ensures smooth needle response across the entire RPM band, eliminating dead zones that plague cheaper gauges and giving you precise feedback when tuning fuel mixture or ignition advance curves. The gauge accepts standard ignition trigger signals, making installation straightforward on points-based distributors, HEI systems, or modern distributorless setups with the proper adapter, and the robust construction withstands underhood vibration and temperature swings common in modified engines.

Hot rodders and engine tuners favor the G/Stock design for naturally aspirated and supercharged applications because the full sweep response catches hesitation and surge instantly—invaluable when dialing in carburetor jetting or testing fuel delivery under load. Installation typically involves a single ignition signal wire, 12V power, and ground; dashboard mounting uses the standard 2-5/8 inch gauge cup found in most classic dash kits. Whether you're building a street machine, restoring a vintage truck, or fine-tuning a competition engine, this tachometer delivers the precision feedback necessary for confident driving and repeatable tuning sessions.