This servo is an awesome bang for bucks!
It is very durable ( I have mine for 4 years now and it is still working like a charm) and the price is right!
For 2 months now i am using this servo in my Sakura D3 drift chassis and it does its job wonderfully!
As a drifter you want to avoid fast steering input, so you dont need a fast servo.
The S3003 also is strong enough for the job as a steering servo in a drifter and even touring car, although you might want to have a faster servo if you want serious touring car action.