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OBD II code 0430 could be a lot of things. The code indicates that the bank 2 downstream (After CAT) O2 sensor is reading that the CAT is not working properly (inefficent). The drivability issues may indicate an actual clogged converter, but I would replace the O2, clear the light and take it for a drive. If the Camaro is still having problems then you may have an exhuast leak or a clogged CAT. If I remeber correctly bank 2 is passenger side.
Hope this helps.
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