HMS, here are thethings that they do . My first o2 sensor still working. But for my 2nd o2, will my OBD-scanner are saying the circuit not functioning. My best bet is that they had somehow dislocate the 2nd o2. Anyhow, the 2nd O2 are not that important. You can have it discon.Basically the 2nd o2 just detect whether the emission that your cat giving out are according the the environemt spec. So here is what happen. should a 2nd O2 detect your engine are giving our a lot of unhealthy smoke, it will give signal to the ECU to be increase the air in. That way, you can get a cleaner air. Since I am not a good environmental ppl, I really don't care how poison my emission is. So F it.
As far as the CEL light, is still working. No probelm. I have my car scan by OBDII scanner and all are in good shape except the 2nd O2 sensor.
HMS, to be specific, when the crack occur on your extractor? The welding line or other place. If you can tell me the exact position, then I might have an idea why your crack so easily.
On the open pod and drop in filter things.. like I say previous in my post, they all the same with stock. Done my dyno after installing S-AFC II between open pod and stock filter. The end whp are the same. But with open pod, my chart slightly peek higher than stock filter at the lower RPM ( 2000-3000). After that they all the same. My concusion is this. Open pod, will one can get a bit faster accerelation only vs. stock. But then again, with the money spend and really no greater whp... well I leave it to others to think whether it is worthy it. I agree with rcstan, our engine are built in the way that certain amount of air are sufficient. Think of this way, Assuming you are breathing, which you prefer, take a big deep breathe hold it and slowly brethe out or Just simply breathe normal? This is exactly the same as the open pod vs stock. Again I leave for ppl to decided for themself.
:D