Eh, it doesn't even look like 1k on the dyno. I think it's a bit of marketing foo. There isn't much to the car though, better cold side plumbing, bigger intercoolers, exhaust, fueling, etc. However, there is also some left there. The launch is shitty and shift timing is shitty. Someone give him some damn slicks or drag radials too. I'm pretty surprised they weren't picking up pieces of his trans with that wheel hop.
That's pretty much the same 60' as mine with just downpipes, injectors, wastegates and tune and I only was mid 10's at 135'sh on a good day. One thing also is the gearing on the car sucks as you get to the top end, the cars seem to fall flat regardless of power behind them. DBK's GT would walk away from that car all the way to 200 once DBK got hooked up enough.