Thread: SD Headers installed and A+++++

Originally Posted by matt5112

or put in one one or two of those cheaters which are basically O2 bung extensions of some sort. I believe TeeWX has more info on those cheaters.

its an extension that spaces out the o2 sensor so it sees less of the exhaust flow, thus making it read a higher percentage of oxygen in the exhaust. its called a defouler and they sell them at literally any parts store.