Hi
Induction kit - waste of money, drilled and smoothed airbox and new paper filter is the way to go. Change the filter (cheap) regularly and you won't need to invest in the performance panel filter either. Search for airbox mods to see whats needed.
Engine mounts - change the front to a solid one which can be bought for about £40 to £50 and then see if the others need doing, as previously said the others you can get away with some standard ones off of differant Golf variants.
Silicon hose kit - depends on what condition your old ones are in. If unsure change them but you should be able to get away with standard ones, go for silicon if the price isn't too much differant.
Windage tray - about £35 from GSF, but probably overkill, do it if your having the sump off.
Baffled sump - probably overkill, depends on the tracks you are going to be running on.
Braided brake lines - yes definately worth it, should be able to get them for about £60
Discs and Pads - good quality OEM discs and uprated pads should do the trick. I use Mintex 1155's.
Coilovers - you pay your money you take your choice.
Powerflex bushes - yes seem to be better than standard.
Sort the servicing out for reliability, sort the braking out for safety, new pads, discs and lines, don't forget to change the fluid for something better, I use ATE super racing blue about £13 from ECP. Then sort the handling out, suspension, uprated anti roll bars work well and can be had secondhand for the Golf2. Get a full alignment done with some extra negative camber and slight toe out will help the turn in. Welding up the lower wishbones has been said by DH to work well with uprated bushes.
Use the saved money to go on more trackdays.
Have fun
Paul
