i not pro in it.. but i know a few things..
u need to tune ur car specially for drifting purposes.. for example
the steering system.. for example, u see those video clips, the
steering wheel can be thrown left and right just by a touch of the
little finger..
also need to upgrade suspension system.. such upgrades will include
coilovers.. some brands would be tein, bc, hks, bilstein.. blah
blah blah..
need to install strut bars also for better handling.. front,
undercarriage, rear.. i think struts prevents under/over steering
too much.. i also not 100% sure..
ur braking system also have to change.. ur rotors.. brake pads.. ur
brake hose.. for better handling purposes..
and i think last but not least.. tyres also very important.. need
to get those with good grips..
about how to drift part.. don ask me.. maybe ask HENG..