As far as I'm aware it does, the second gen I did this on didn't tell me and I'm not experiencing anything since I did this in December with the fresh motor.
Yes, there was a steel gasket in the gasket set, it still leaked with that one so I bought another gasket that was metal with a fiber, I installed both gaskets hoping that would take care of it but it didn't.Did you replace the manifold gasket when you rebuilt it?
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A leak isn't your problem, your catalytic converter gutted is your problem. All you can do with a gutted cat is space the down stream 02 sensors or buy dummy sensors that will fool the ECM. The bent flange on my upstream cat is causing an exhaust leak that is causing my P2A00 code. The converters are good on my car it is the bent flange on the upstream converter that is my problem.I'm curious to know if you ever got it figured out. I'm currently dealing with a p0420 code but my cat is gutted so I'm trying to figure out if I maybe have a leak somewhere.