SMI Tach Warning LT and LED BKLT 4-1/2in

The SMI Tach Warning LT and LED BKLT 4-1/2in is a specialized tachometer gauge designed for high-performance and professional racing applications where real-time engine speed monitoring is critical. Built by Longacre, a trusted manufacturer in precision motorsports instrumentation, this compact 4.5-inch warning tachometer serves drivers, crew chiefs, and technicians who demand reliable RPM feedback during competition and track testing. The integrated warning light and LED backlighting system ensure visibility in variable lighting conditions, making it an essential addition to race car dashboards and professional shop environments.

This tachometer features advanced LED backlighting technology that provides clear readability whether you're running day sessions or night events, while the warning light functionality alerts operators when engine RPM approaches critical thresholds—preventing over-rev damage and protecting engine longevity. The compact 4.5-inch dial face fits cleanly into tight dashboard spaces without sacrificing gauge legibility, and the precision analog movement delivers smooth, lag-free needle response across the full RPM range. Weighing just 0.85 lbs and measuring 6.6 x 6.4 x 9.3 inches, the unit integrates easily into custom gauge clusters, hot rod builds, and racing control panels while maintaining professional appearance and industrial durability standards.

Professional mechanics, race teams, and performance enthusiasts benefit most from the SMI Tach Warning LT's combination of compact form factor and feature-rich design. Installation typically requires standard 12V electrical connection to the ignition system, making retrofit integration straightforward on both carbureted and fuel-injected engines. The warning light function pairs effectively with electronic rev limiters or manual shift point management, giving drivers the visual feedback needed to optimize shift timing and protect powerplants during sustained high-RPM operation. Whether outfitting a dedicated race vehicle, street machine, or diagnostic shop setup, this Longacre gauge delivers the precision instrumentation professionals expect.