Autometer Tachometer Gauge 10K RPM 3 3/4in Pedestal w/Ext. Shift-Light - Black Dial/Black CaseFeature Points Through the dial incandescent lighting features bright, distinctly illuminated numbers Includes red and green bulb caps for multiple illumination color options Compatible with most 4, 6, and 8 cylinder engines (2 4 pulse per revolution ignition signals) with points, electronic, and most 12V high performance racing ignitions. 12 and 16 volt compatible, well suited with nearly every street car or race car electrical system Optimize use of