[MisterTib]

Merry X-mas to all, I'm getting ready to put my alpine on, and I'm installing a AEM wide band sensor, I know I have to put the sensor before the cat, my question is though, do the stock headers have cats or pre-cats in 'em, and does any body know if this will be a problem?

 

[eric2565]

yes they do have pre-cats in them not sure if it will cause a problem or not

 

[05GT]

You definitely won't be receiving a completely accurate A/F ratio taking the sample after the pre-cats.

 

[MisterTib]

I hope I haven't wasted money on a gauge I can't use, the instructions say to install the sensor at least 18" down stream from the exhaust port, hell the pre-cat is hardly a foot down stream, I guess I'll have to call AEM and see what they say!