Impressions so far
It usually takes me a few days to get all the readiness monitors to set, but to my surprise I got 6 of 7 monitors cleared just during the first 20 minutes of driving. The 7th which was EVAP completed the following day. In the week or so of driving I haven't gotten any CEL, but I will update this thread if any codes pop up.
Driving impressions
The car drives perfectly normal and if anything I think the sims may have actually eliminated my fluctuating idle. Despite what everyone says the rear o2's do play a small part with
fuel trim adjustments. And ever since I installed these headers I've been trying to diagnose a fluctuating idle. This leads me to believe the car's PCM is not able to make the proper adjustments when the rear o2 readings are so close/direct in the absence of a cat. In my case I think the o2 sim is doing what's it's supposed to do in providing a signal as if a normal cat were there.
The Proof
