CorSport Mechanical O2 CEL Fix / Defouler
This mechanical O2 defouler adjusts the position of your cars current oxygen sensor located after the catalytic converter. This alters the amount of gas that reaches your oxygen sensor, causing the ECU to stop attempting to alter the flow of gasses due to a lack of a catalytic converter. The end result of this simple and easy change is that your cars check engine light will no longer be on.
There are some exhaust systems which this will not work as effectively for, depending on the tuning of your ECU and the layout of the exhaust system. However, this mechanical O2 fix is well known for eliminating most check engine light errors caused by the O2 sensor.