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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

Stainless Plug for O2 Sensor, 18 x 1.5mm
Stainless Plug for O2 Sensor, 18 x 1.5mm

This special stainless-steel M18-1.5mm plug is designed to replace std sized oxygen sensors in situations where the oxygen sensor is not needed or will be damaged when using leaded fuel.

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.

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.