I discovered today that the discount code applies to the ceramic headers. And today the black friday discount is 25%. I think it's BFSAVE25. The code is good until midnight (well. 1 second before midnight) tonight central time. This makes the ceramic coated headers $789 which is 1 more dollar than the black coated headers which they don't discount.
So for me it seemed like an easy choice. Pay $788 for black coated headers or $789 for ceramic coated headers. Shipping is free. The taxes suck, tho