I just put on my DC Sport Header. Now my check engine light is on because the stock exhaust manifold had a cat in it. Someone told me to buy a O2 simulator. I want to find out if anyone else has been through this.

You can use spark plug anti-foulers to correct for this. It pulls one 02 sensor out of the flow a little so there is a difference in readings... which is what the computer is expecting. I believe there is a thread on this with instructions if you search. If I come across it I will post the link.

Read this:
http://www.scionlife.com/forums/viewtopic.php?t=49748

and then do this:
http://forums.evolutionm.net/printthread.php?t=99137

Getting an O2 simulator is a electronic fix and the antifowler trick above is mechincal fix.

Here ya go.. has some pics too. Better than me trying to describe it all :P I think if you read through all of the posts on there it explains it all.

http://www.scionlife.com/forums/viewtopic.php?t=49748&start=0

Thank you Tommy and Engifineer I am going to try this

how does the car sound now with your headers installed?

What torque specs did you use on the bolts?

I went with what the torque spec that DC recomends.
I wanted to say that I followed the link regarding the anti fouler plug insert and it seems to be working just fine. I did add one additional step. Having done automotive electronics for a long time I was pretty sure I could clear the check engine code if I diconected the battery for a few minutes. So that was the first thin I did then followed the rest of the link's info. Ta Da it worked. Thanks for all your help.

is the DC header actuallly ceramic coated?

^^^^yep

Boom12v are you the one i met in Alamogordo, NM??? if so whats up....

Hey brownb yes it is a ceramic coated header.
Yea that me what up kutsuju? Just sponsored the AEM / DC sport drag car of Stephen
Papadakis. That took a little work but its' on now. If you go to my profile gallery pic you can see my tC. Later