Full exhaust System for NA yaris

[t0m4s]

Originally Posted by CASTREX

Sedan = Liftback. The only difference is the axleback section. In the sedan is a little longer.

Both models come with 2 cat converters. First one just after the exhaust manifold and the other one a few inches after.
The car has 2 sensors on the exhaust the first one and the most important is in the header. You can not mess with that one. Then there is a second sensor right after the first cat. The function of that one is monitoring the functionality of the Primary (first) cat. That one can be easily tricked if you plan to go catless. There is no sensors after the second cat. Therefore you can remove that one if you want and your car won't even notice it.

so when i change the header i just need to leave the sensor where it is and replace the header?

[CASTREX]

Originally Posted by t0m4s

so when i change the header i just need to leave the sensor where it is and replace the header?

Yes. You just need to unplug the sensor on the stock exhaust manifold. Take the manifold out and install the header and finally put te sensor back on the header. It should have a bung for the sensor. Pretty simple