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Tried searching but couldn't really pull up anything on this. Anyways, i was plannin to get a DC header (made for the ex) for my 01 auto lx sedan but i wasn't plannin to use a cat. If i just run a straight pipe right after the header, where do i put the 2nd o2 sensor? Just pick a spot, drill... tap and its all good? HELP! lol

 
Rep Power: 331

weld in an o2 bung and run either an electrical or mechanical o2 sim, otherwise you will have a CEL.

 
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Man... i just wanted new headers to make my engine bay "complete" and now i find out i have to buy a lil bypass sensor that costs 80 bucks! *sighs heavily* Im just a really cheap *** and wasnt plannin to pay over 100 bucks for everything lol a friend was gonna sell me his headers for 60 bucks and then i was just gonna custom pipe everything else since i have access to a tubing bender. I didn't think i'd need a lil bypass sensor, nor think that it costs 80 bucks lol. But thanks for the input guys =P appreciate it.

 
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just use a mechanical o2 sim, like i stated earlier. ****, wtf is up with people not reading my posts? buy yourself two spark plug non-foulers and space the 2nd o2 sensor away from the downpipe....presto, no CEL. all under $10...

 
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lol *hugs* i read ur post but still dont fully understand the "mechanical" sim. Can you elaborate more on that set up? non-foulers? Hrm...

 
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Okay, nvm i just found a very useful site on aol haha. I understand the mechanical sim now and how it fools the sensor. Heres the link if anyones curious:

http://www.s2ki.com/forums/index.php...9&hl=simulator

lol yay, now i can do my ex header conversion! Thanks peoples!

 
Rep Power: 331

some people are skeptical, but it is tried and true. works like a charm everytime.