Thread Starter
#21
Thread Starter
#21
In the Focus ST community many people run a defouler on the second O2 sensor to keep it out of the direct stream of the exhaust.
This helps the car not throw codes yet allows the sensor to become ready when running no tune.
Option one: https://www.modernperformance.com/product/Vibrant_Oxygen_Sensor_Defouler/caliber_exhaust
Option two: http://www.2j-racing.com/fiesta-st/2jr-fiesta-st-downpipe-de-fouler.html
This helps the car not throw codes yet allows the sensor to become ready when running no tune.
Option one: https://www.modernperformance.com/product/Vibrant_Oxygen_Sensor_Defouler/caliber_exhaust
Option two: http://www.2j-racing.com/fiesta-st/2jr-fiesta-st-downpipe-de-fouler.html
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