GlowShift Tinted 7 Color Series 2” (52mm) Diesel Tachometers read from 0 to 5,000 RPM and can be installed to virtually any car or truck with a diesel engine. This diesel tach gauge is the perfect addition to performance vehicles, trucks running long distances, modified applications and more. Monitor RPMs with unrivaled accuracy and protect against transmission wear at the same time. Each diesel tachometer RPM gauge is installed by connecting the included color coded wiring harness. Detailed Installation Instructions and Dedicated Customer Support also come standard with your purchase.