That's an EASY one.
The BEST 1:10 drift car is Yokomo's MR4TC chassis. Any pro drifter will tell you that and most amateurs that have been doing it for awhile will tell you. It's bottom level chassis in stock form is better than most hopped-up chassis out there now. It's one of the few chassis you can get and NEVER change and still out drift hop-up chassis. Check the D10 RC series. That's what they use. They have the best track record for that.