^ that sounds like a plan but i may be working though.
i'll holla at you in a pm by the end of the week to let you know what's up.

 

FYI to all.
i was able to swap my stock y-pipe from my rcsb into the Z, so they are interchangeable. the only thing that was different was the shape of the cats. also the code hasn't popped up again but i'll keep an eye on it.

now i'm going to experiment with gutting the cats of the Z's y-pipe and maybe put them on another day.

 

Do you think there will be a worthwhile gain?

 

well if it's indeed that the cats were defective then yeah it sould gain some.

 

Dang lance, I wish I would have caught this earlier. If your stock catalytic converters are bad (or one of them), take it to the dealer and get it replaced under warranty. It doesn't matter if the vehicle is out of warranty, some emissions equipment is warranted for longer. Read below. The dealer replaced mine on my 02 when it was out of warranty with no problems.


Catalytic Converter Laws

Rules for Replacing Converters
In 1986, the U.S. Environmental Protection Agency issued new guidelines for the construction, efficiency and installation of aftermarket catalytic converters. All CleanAir converters listed in this catalog have been designed, tested and manufactured to meet this policy.

In addition, CleanAir converter listed in this catalog is appropriate for use under the current requirements of the California Air Resources Board (C.A.R.B.).
E.P.A. guidelines state that replacement converters may be installed only in the following situations:

1. The vehicle is missing a converter
2. A state or local inspection program has determined that the existing converter needs replacement
3. Vehicles manufactured prior to 1996 must have more than 50,000 miles, and a legitimate need for replacement must be established and documented
4. In cases of OBD Il-equipped vehicles (1996 and later), the O.E. manufacturer's 8-year/80,000-mile warranty must have expired and a legitimate need for replacement must be established and documented.
Please note that Federal law prohibits removal or replacement of a properly functioning O.E. converter.

When replacement of the converter is appropriate (as outlined above), the E.P.A. further requires that:

1. It be installed in the same location as the original
2. It be the same type as the original (i.e., two-way, three-way, three-way plus air/three-way plus oxidation)
3. It be the proper model for the vehicle application as determined and specified by the manufacturer
4. It be properly connected to any existing air injection components on the vehicle
5. It be installed with any other required converter for a particular application
6. It be accompanied by a warranty information card to be completed by the installer.

 

GM will cover your cats for 8 years/80,000 miles from original in-service date.

 

thank you for the info Wes