You now need to drill out 1 of the non foulers using a 1/2" drill bit. When finished this is what it will look like.

Side by Side comparision of the orignal and now modified non foulers

o2 Sensor inserted in the modified non fouler

Second, unmodified non fouler now installed on modified non fouler

Original non fouler->Modified non fouler->o2 sensor

Fully installed


By moving the secondary o2 sensor away from the direct path of exhaust flow and limiting what exhaust gas can get to the o2 sensor the ecu believes that there is a functioning cat still in the system.

Milage at time of install 18900 and ecu reset, will post details in roughly 100-150miles when cel usually comes on