The first time I heard about them was on ESPN. They said the headers were laid back to 32 degrees, instead of the conventional 40 degrees. I'm surprised NHRA stood for it without a fuss, and I can't believe laying the headers back 8 degrees would make nearly a tenth of a second ( and 7-8mph) difference on a car that was already running high 3.90 ETs. I'm guessing some clutch work went along with the header modification.