down pipe questions - Toyota Yaris Forums

punch · 12-17-2006, 03:39 PM

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 · 12-17-2006, 04:47 PM

i believe only 2 o2 sensors

Black Yaris · 12-17-2006, 04:56 PM

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 · 12-17-2006, 05:38 PM

Mine has only one.

punch · 12-17-2006, 07:12 PM

Quote:

Originally Posted by 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?

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* · 12-17-2006, 08:55 PM

Quote:

Originally Posted by punch

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 · 12-18-2006, 01:25 AM

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 · 12-18-2006, 02:04 AM

Quote:

Originally Posted by 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.

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?

12-17-2006, 03:39 PM	#1
punch Drives: 2007 Yaris Sedan "D" package Join Date: May 2006 Location: Barrie, ontario Posts: 852	down pipe questions 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

12-17-2006, 04:56 PM	#3
Black Yaris der Zeck View User's Garage Drives: '05 Audi A4 1.8t quattro Join Date: Sep 2006 Location: Toledo, OH Posts: 5,231	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? __________________

12-17-2006, 05:38 PM	#4
Katana Drives: Yaris LB 1.3lt 06 Join Date: Aug 2006 Location: Under the hood! Posts: 1,124	Mine has only one. __________________ It's not the ride, it's the rider!

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12-17-2006, 04:47 PM	#2
dngz View User's Garage Drives: black yaris sedan Join Date: Jun 2006 Location: vancouver Posts: 475	i believe only 2 o2 sensors

12-18-2006, 01:25 AM	#7
DTM_Yaris Turbo Yaris Drives: 07 PW Yaris Join Date: Dec 2006 Location: Dulles, VA Posts: 82	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.