I'm in the same boat. Passes on the numbers, fails visual. There are NO smog legal headers for our cars that I can tell. I even tried using a Thorley EO number (D200-21) which covered a generic range 78-95 Nissan vehicles and it did not work. They actually checked with Doug Thorley who told them is was not legal. I've tried getting an exemption but so far, they (BAR) are ignoring me.
What have you done to pass????