After my experience from my last 2 trackdays. I would say brakes and handling could do with uprating, i have been using standard disks with mintex pads standard brake lines and dot 4 brake fluid and i have noticed i can do about 15-20 minutes then i have no brakes left, so would have to be better fluid like a dot 5.1 braided brake lines and i have upgraded to st185 setup which i have yet to fit Handling if you dont want coilovers some springs and adjustable shockers should be fine like gab, koni etc a few upper braces and lower braces and i noticed at the trackday on friday everyone had rear arb's and i didn't and noticed my backend was all over the place when i pushed it into corners and lost it a few times but never span. I guess power is not everything on most tracks as if you can get the corner speeds good then you will alright as a saxo was proving at cadwell park on friday was running 110bhp but corner speeds were good. Tyres i want to try out some r888s as im using paradas now but when they get warm they are really grippy i thought Then theres power lol