Right, at this point in time all ive done to the car to make it driftable is:
Welded diff (obvious
The two ^^above is what you really need. Additional things ive done to make the car better are the following:
25mm RCA spacers...reduces bump steer and body roll
Rear eccentric camber bushes to bring the camber in slightly....still running -2.5 on the rear...soon to be nearer to -0.5-1.0
Front camber set at -3
Rear toe in 0.02
Front toe out 0.02
Power steering cooler <----for obvious reasons
Catch tank (Recommended to prevent lots of oil caking your intake)
Havent actually fitted the front cusco arms yet since i still need to modify the hubs. but planning to run about -4 camber. But to answer your question...I got them from Japan at an auction for £150
Front KTS traction rods were also fitted for more castor. This helps the self steer during transitions, running about 8.5degrees now.
Apart from that.....cant think of anything else dude. I run 215 tyres at 30psi and she spins them up pretty easily, but thats because its a turbo. So smaller width and higher tyre pressure will do the trick for NA.