Phil claimed to run an 11.8 in his WRX back in the day, but no one ever saw the timing slip. However, I know that he went through about 3 gearboxes to get down that low, and ran a huge turbo on the ragged edge in that thing. I think it was legit, but he destroyed the car to get there.
That was back in '02 or so... I don't think anyone's hit the strip since then with a faster car.