relocating the cat converter

[Mooseimage]

Is it possible to relocate the cat. somewhere lower, like along the bottom of the car, with the sensors? I mean, I guess it can be done, but will it pass emission expection? If I can do this, it would make life so much easier with swapping the cat with a straight when emission time comes around.

Also, will this hinder performance or make the ECU go koo-koo? (Then again, once I get rid of the cat, it won't matter)

[djwimbo]

It can be done. Has it? I do not know. I plan on doing this later, but that'll be in a year or so.

You would have to extend the wires to the oxygen sensor and have a bung installed downstream from the cat. Otherwise if you have a "chip" with a catalytic converter efficiency code delete (most stage 1.5/1+) you can just make it look like it hooked up.

[Mawhitey]

I have an AEb and my cat is mounted under the car, but then i dont need the 2nd oxy sensor like the later cars

[Mooseimage]

All right, cool. Thanks for the info. I plan on doing this also, just got to save up the money when I go all out on my car. Aiming for 350+ hp, 400 would be perfect. Trying to get rid of restriction as much as possible.

[1NaudiA4]

I had a HFC on my previous exhaust set-up mounted underneath the car with the o2 sensor right behind it. No check engine light and passed emissions.

[black99.5a4]

I have a 99.5 which i'm assuming is still AEB cause its ndbw, i have 2 02's and what i think is a cat right behind my turbo.

[salz2135]

he's from the UK though, so maybe the older AEBs didn't have the secondary 02 sensor.

[djwimbo]

he's from the UK though, so maybe the older AEBs didn't have the secondary 02 sensor.

AEB is an OBD2 engine. Therefore it has the pre and post catalytic converter heated oxygen sensor.

[salz2135]

yes, thanks for telling me what OBD2 means.

I misread his post and thought he wrote that the secondary 02 was nonexistent.

[andyrew]

The SMOG guys only look for a cat, not that its in a certain location.

The guy that I had smog mine last started under the car in the front, worked his way to the muffler when I told him its in the engine bay..

[Mooseimage]

Great info. This is very encouraging, makes me more persistent on saving those pennies to go all out for my mods.

[Mawhitey]

I only have one oxy sensor its located where my cat would be in a bung welded to the exhaust itself. No 2dn one, so i guess UK must have different regs then? Just for an O2 sensor pre cat, not after

[salz2135]

so I did read correctly....

[1NaudiA4]

Psh I don't need no stinking cat... I passed the air test without one.