There has been a championship recently created for mk2 golfs... the engine has to stay standard and they tyres have to be a certain make... ill see if i can find the thread
http://www.golfgtiracing.co.uk/A summary of the regulations is given below.
* 2 classes – 8 and 16 valve.
* Standard engines, with control camshafts.
* Exhausts free from manifold back.
* Spring and damper rates free.
* No changes to any suspension mounts allowed.
* Bolt in cage only.
* Control tyres.
* Minimum weights for both classes.
should be a good way to enter into car racing and quite cheap i would expect also