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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 Weld Bung for O2 Sensor, 18 x 1.5mm
Stainless Weld Bung for O2 Sensor, 18 x 1.5mm

Add a new or replace a damaged oxygen sensor bung with this stainless steel weld-in bung with M18x1.5mm threads.

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.

Mild Steel Weld Fitting for O2 Sensor, 45 Degree Angled
Mild Steel Weld Fitting for O2 Sensor, 45 Degree Angled

This 45 degree angle Oxygen Sensor Weld Bung allows you to have the oxygen sensor angled into the exhaust pipe instead of perpendicular which may reduce back-pressure and increase performance.