O2 Sensor on the Downpipe

[B18aCRX]

Is it better to have the O2 sensor on the downpipe, closer to the turbo, or closer to the catalytic converter?


Thanks

 

[civicious]

Closer to the cat would be my guess...

 

[beerbongskickass]

Stick it somewhere in the downpipe. Mine is fairly close to the turbo and works well (4 inches maybe?), so I don't think placement is that big of a deal. I'm pretty sure you don't want it closer to the cat converter though. Just make sure it's out of the way of anything.

 

[posol]

right before the cat is the best reading.
all 4 pipeshave come together, merged, and the flow of exhaust is smothed out.