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Air/Fuel Ratio Gauges and Accessories

Correct air / fuel mixture is critical to achieving maximum power, efficiency, and engine life. The color of your exhaust pipe can only tell you so much! Air / Fuel Ratio Gauges tell you exactly what is happening in your engine, as it happens.

Recent Top Selling Products for this category

Mild Steel Weld Bung for O2 Sensor, 1" Reach w/Plug
Mild Steel Weld Bung for O2 Sensor, 1" Reach w/Plug
Wideband O2 Sensor Only (Bosch LSU 4.2) for Innovate
Wideband O2 Sensor Only (Bosch LSU 4.2) for Innovate

This Bosch LSU 4.2 Wideband 02 Sensor acts as an on-off switch signaling a rich or lean mixture. Gives a more linear response, accurately measuring mixtures as rich as 9.0:1 and as lean as pure air.

Wideband O2 Sensor Only (Bosch LSU 4.9), for AiM LCU-One
Wideband O2 Sensor Only (Bosch LSU 4.9), for AiM LCU-One

This genuine Bosch wideband O2 (Lambda) sensor is the direct replacement for the sensor supplied with the AiM LCU-One Lambda Controller.