1. limited slip diff.
2. tires fit for the event
3. adjustable coilovers & camber plates
4. drift specific alignment/ suspension setup
Last year our PCA region did an AX driving clinic, and we included a skid pad. It was very telling how difficult it was for Boxsters, Caymans, 996's, and 997's to break the rear tires loose and get into a donut. The one fella with a 350Z literally smoked us all, as the car could immediately be put into a donut. Of course, he also regularly spins out during AX's...and loses to the Porsche crowd.