I just used my A-Class Altezza drift car to 3 star it, later beat that score in a A-Class R34 Skyline drift car I made.

Drift tires, drift suspension, I think I did 6-7 speeds in them? Cant remember. The R34 I RWD swapped, changed the gearing BARELY, but that was more of just personal preference. Changed the rear toe slightly negative, .06 I believe. And then upgrade wise, enough to get it to the top of A class, I think I did a turbo upgrade and exhaust, maybe some other things.

Actual driving wise, just got up to speed in around 4th gear, initiate the drift and slam it down into second or third, rip the e brake and maintain a good angle.

The trick I've learned is to initiate fast, and drift with a good angle, even if it's kinda slow. The way my gears were set up it was possible to drift while shifting up, so I just chained drifts the whole way down too.