What makes an RC drift car?

A quick answer to that question is: Any RC car or truck that has 4WD can be a drifter.
The vehicle can be electric or nitro powered...it doesn't matter just as long as it has 4WD.
I've read postings where people ask, "If real drift cars are 2WD why can't a 2WD RC car work?"
Well, when you shrink the car down to 1/10 of a real car the dynamics change. You don't have the luxury of a clutch or handbrake. It's pretty difficult trying to drift a 2WD RC car. I'm not saying that it's impossible; I'm just saying save yourself the hassle and stick with a 4WD drive car. By the way I haven't found a 1/10th scale 2WD car to test it out.
In future posts, I'll go over the different cars and chassis' out there.
Another element that is different in RC drift car is the tires. HPI, Yokomo, and Tamiya have specially made drift tires. You can also use ABS or PVC piping. I'll go over those as well in future posts.