For all AutoMeter gauges (except Air/Fuel & Auto Gage), speedometers, and most in-dash tachometers. Does not work with Digital & LED Lit gauges (i.e. Cobalt, C2, ES, GS, Elite, Factory Match, NV, Phantom II, Sport-Comp II, Ultra-Lite II). Upgrade your standard instrument lighting with intense LEDs. Replaces 161, 193, 194 & 168 style wedge base bulbs only.