By removing the CAT and probably the o2 sensor will generate a SERVICE ENGINE SOON light ???? or i reuse it ?

 

ive heard of people just going in and just knock out all the insides of the cat so theres nothing in it but it still looks like you have a cat on. Its the same thing as high flow.

 

yea, i think my dad did that to his bronco if i recall...anyone know how THAT's done?[&:]

 

yeah you will get a check engine light for removing the cat as well as the downstream o2 sensor.

that is NOT the same thing as a high flow cat. a high flow cat still has the catalyst elements inside it.. and WILL flow much better than a hollowed out stock cat. when you hollow out a stock cat, its not exactly a good thing. the exhaust gasses will expand in the hollow area and need to contract again to exit.. which slows down the exhaust velocity as well as the scavenging effect.

 

doh!!!! slow ur thinkin of the catalyst sensor not the o2 sensor.... and the magnaflo is a good cat option its what ive got on my car. Its in the code books as the catalyst as well for my DTH computer.

 

downstream o2 sensor = catalyst o2 sensor

theres 2 o2 sensors on our 1g neons, commonly referred to as "upstream" and "downstream"
the upstream is the one located in the exhaust manifold/header, while the "downstream" one is located right after the cat converter.