[cajunzl1]

Adding an AEM wide band o2 gauge on my ZL1, my muffler shop is giving me grief about putting it before the primary cat. He said it would be tight getting it welded and servicing the sensor.

He would like to put it after the Cat. I recently watched a CSP video and Andrew installed it in place of the rear 02 Sensor.


Is the AFR reading that much different after the Cat to make a difference tuning? also does anyone have photos of their O2 location before the Cat??

Thanks