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Ok…so I'm new into this, so to clarify…just weld the 2 cat shells over the top of pipe, meaning no filters or restrictions so it would pass visually?

Nothing on, so no codes to pull…just the emissions report from Phoenix Emissions station. It passed in NV. I was also thinking about replacing the thermostat (seems to run colder, with the needle sitting about on the N of Normal, so definitely the low end). I was going to try that first.

Need a little help…I just took my 94 5.0 to the emissions and it didn't pass. I then took it to the "guarantee pass emissions" shop down the road for a diagnostic. They told me that the Cobra requires 4 catalytic converters not just 2 and that I was missing the front 2. Is this true? This...