In all honesty dude.. Just to get out there and slide the arse a bit you dont need to do anything.
I have been drifting for a while now in an NA r32 GTS4 (in RWD of course) with an open diff for a while now and can mix it up with everyone else pretty well.
So if you just want to go out there and slide around a bit and have some fun then your car is more than capable of doing so. Even with the stocko VLSD
If you have some money to spend and want to an easier car to slide id recommend same as what Hamish said.
- Lock Bar
- LSD - Mechanical 2 way
- Coilovers just them are fine to begin with but I highly recommend strut bars (minimum) and sway bars, pinapples can make a car a bit of a handfull on the road (but then again so does a 2way)
- A bucket seat of some form - helps you focus on drifting and not getting out of the passenger seat
Id say that would be minimum if you have some money to throw away
- Before power.. Half cage. You'll realise the imporance of having a solid back end once you get out there.
The next two are not ESSENTIAL but its what I found handy
- Oil cooler is a good idea for peice of mind + a good set of gauges with light or sound warnings. Drifting is tough on a car.. let alone drifting in the Australian summer
- A shift light.. Yes yes.. its sexy hearing your engine boucing off the rev limiter, but its mechanically brutal
- Id say leave power for last. Heaps of people rely too much on power to swing the arse around and not developing their skill as drifters. A stock RB25DET is more than AMPLE for a beginning drifter.
A freshen up of rear brakes is a good idea too.
Some people find a drift button as very important, but I think their being lazy.
BTW. Most places will require you to have a secondary set of bonnet restraints too. You dont need to go bonnet pins, there are underbonnet clips (which you can get from pet stores) that you can clip onto your radiator support and the underside of the bonnet.
A blue trianglular sticker pointing towards where the battery is are also pretty much requirements for drift events