Hitchcocks Forum

Learned people. What do I do with the oxygen sensor if I fit our hosts free flowing exhaust down pipe.

If our hosts advise that the new exhaust works fine with no adjustment to the ECU leave the O2 sensor alone; just fit the new system. If, on the other hand they say that you need a Power Commander V then that will require removal of the O2 sensor and replacing it with a blanking plug.

Sorry, I thought you meant a silencer. My mistake. For just the downpipe remove the sensor from the original pipe and put it in the new one, all other things being equal.