Just to come full circle with my problems in case anyone else screws up like me:
The black wires were crossed on the passenger O2 sensor that needed extended. This caused one of the pins in the PCM to burn out. Essentially, one black wire has 12V on it and the other has 5V. When the wires were switched, the 12V signal was to the 5V pin which caused the problem and burned out the pin in the PMC. This also explains why the other A/F sensors was reading a steady 5V on the scan tool.
The car ran for about 100 miles as the computer "adjusted" itself and eventually adjusted itself into car suicide. The only way to get it to run with the bad pin was to unplug the O2 sensors and run the car in a closed loop. I bought two new O2 sensors, a new PMC, and needed a flash from the dealer on the new PMC. The repairs cost more than the actual headers because 5 cents worth of wires were crossed. Moral of the story: take your time and read the damn instructions!
But oh my does the car sound excellent! Great quality product by FI!
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