Uprate brake fluid with some higher boiling point stuff.
Replace rubber hoses with braided goodridge
Uprate carriers to allow 312mm discs (as above)
Get better brand disc/pad combo like mintex, ferrado etc...
Rear antiroll bar
Uprate all bushes to powerflex or similar from dogbone to wishbones...
Coilovers, some will say wietec etc... if on a budget I'd go JOM as they are stiff even with a small drop over the FK-AK's
Install some ducting to blow on the vents, popular in the states not seen it much in the UK
