Secondary Cat Delete?

[ApolloJA]

Ok so im thinking of deleting the secondary cat but are there really any noticeable differences in doing this?

[Betrivent]

You're killing the environment ever so slightly more

[YarisSedan]

You probably will notice a difference in sound, barely any difference in power, if anything you will loose some back pressure so you might loose some low end torque. I wouldnt recommend it.

[why?]

Originally Posted by Betrivent

You're killing the environment ever so slightly more

Which is a wonderful benefit, because in fact, all this crap we add to the cars actually adds to carbon dioxide emissions, not reduces them. Cars before the terrorist organization known as the epa came about have zero carbon emissions.

Just goes to show, doing things without having a clue about them will always lead to negative repercussions.

[YarisSedan]

Well the main emission that no matter how perfect and complete the combustion of the engine there will always be nox only 2 ways to reduce it in a engine is to lower the combustion chamber with a EGR system or install a catalytic converter. Remove the catalytic converter the vehicle will emit high nox. Every internal combustion engine does not just cars.

Nox is what causes acid rain and smog