Designed for the serious engine tuner, the Microtech AF-1 Air/Fuel Ratio Meter can be swapped from vehicle to vehicle or be permanently mounted into race cars, etc., giving you instantaneous feedback on your engine's running condition.

Our NEW version now uses the BOSCH UEGO-5 wire sensor with unrivaled temperature compensation and accuracy under all conditions.  This sensor is far superior to the now-superseded Bosch LSM-11 sensor which many of our competitors still use.