down pipe questions

[punch]

since our downpipe, has 3 cats, is there also 3 o2 sensor's, is anyone planning a mod for this in the future, I ran a highflow cat on my pt cruiser, yet it still used the 2 o2 sensor's and performed great, would like a full engine, to tailpipe exhaust upgrade.

punch

[dngz]

i believe only 2 o2 sensors

[Black Yaris]

3 cats? I only saw 2 right after the O2... where is the 3rd? I know we legal have to run A cat, so I am wondering if we can remove 1 or 2 of the cats and leave one remaining to be legal?

[Katana]

Mine has only one.

[punch]

3 cats? I only saw 2 right after the O2... where is the 3rd? I know we legal have to run A cat, so I am wondering if we can remove 1 or 2 of the cats and leave one remaining to be legal?

your car is already illegal, smoked corner lights, disabled Daytime lights!


owners manual page 181, 3 way catalytic converter, or is this sedan only??

[Chris07LB]

your car is already illegal, smoked corner lights, disabled Daytime lights!


Disabling DRL's is not illegal in the USA, only Canada Im guessing. He is from Ohio, USA.

[DTM_Yaris]

Header with primary O2
Catalyst
Secondary O2
Catalyst
Resonator
Long skinny pipe we call exhaust
Heading to very restrictive muffler.
That is the order of the exhaust.

[punch]

Header with primary O2
Catalyst
Secondary O2
Catalyst
Resonator
Long skinny pipe we call exhaust
Heading to very restrictive muffler.
That is the order of the exhaust.

ah ok, it was that resonator that threw me off, so are you going to make us a nice downpipe that will have a highflow, cat and open up the resonator as well?