I was just wondering on my 95 burb (5.7 L), if the exhaust was made to be a true dual would there need to be dual O2 sensors? I have found many sites that will dual it after the cat and have headers, but none have a set up for true duals.

Also, if two are needed how would that be accomplished?

Not sure if it'* the same..

My 00 Silverado 5.3 has 4 O2'* because of the dual cats on it from the factory. Do you have dual cats before it dumps into a single pipe?

IF you have a true dual set up you need 2 cats and extra 02'*.

I have a cat that contains the y pipe and attaches to the manafolds. There is one O2 sensor at the y on the cat. This link will show you what the cat looks like.
http://www.partsamerica.com/ProductD...pe=145&PTSet=A

My desire is to have a true dual system with dual cats, but I just don't know how the system would respond with only one bank of cylinders being monitored by a single O2 sensor. By the way this is still a TBI motor.

You won't be able to add an O2 behind the second cat..the PCM won't have an input. j

I wonder if the new piece would be an H pipe which would give you good readings after the dual cats.

I think there is a little misunderstanding. I have a one cat and one O2 sensor (before the cat). If I dual the exhaust do I need to have an O2 sensor in both pipes before each cat.
Or will it be okay to run dual exhaust, dual cat and single sensor before one of the cats.

I'm onboard with you.

And completely unsure how you could hook up extra sensors on a system that wasn't designed for more than the number you currently have.

Have you checked with any of the truck forums?

Yeah, they all suggest an H or X pipe before the cats and put the sensor in there. Local muffler shop just wants to put it in the right bank, just not sure how that will affect the tuning loop since it would only be sensing the exhaust from only half the cylinders. What is your opinion on the single O2 for the right side and none on the left?

My problem with the H or X pipe is the clearance being that the truck is 4x4 I don't want it hanging too low.

I would H or X.. that will mix the exhaust from both sides and allow for the "best" reading. True duals w/o the H or X could have one side to have an issue that is never detected by the other side.

That was what I was thinking. Thanks for the input, now I have a project to get the funding approved for (the wife) if ya know what I mean?