So the Z3 is race ready now.
I have changed oil, oil filter, K&N air filter, fuel filter, wipers.
Also, powerflex front/rear anti-roll bar bushes.
M Coupe front control arm bushes.
EBC USR discs (front) and front/rear EBC redstuff brake pads.
Castrol brake fluid.
I also removed about 25 kilos of unnecessary weight.
I tested the car last monday in Anneau Du Rhin (a track close to Basel, in France).
It's quite capable and definitely fun to drive.
I embarrassed much 'faster' cars in the track, even though I am still running some rubbish 'Gremax' tyres.
I am really happy with the budget brake solution. The brakes performed very well (I was doing non-stop 30 minute sessions) without any brake fade.
The suspension is pretty standard (only lower springs) but I don't have a complaint at the moment.
I clocked a 997 GT3 doing 1.31 (dry).
With the CSL on slicks but wet (so I was backing off in 2 fast corners) I had done 1.32.
M Z3 Coupe with slicks, race suspension, roll cage, exhausts was doing 1.35.
I did with my Z3C 1.37. Not bad at all :-) Also the laptime of the CSL in the wet is fecking amazing (it's the driver after all ... who has skills

)
A pic from the track
2 pics from a practise session today.
Note : I drift everywhere with the Z3C, it's mental !!!
As you can see, it's very practical having plenty of space in the trunk
I have also bought an AC Schnitzer gear knob and waiting for it to arrive
Next in the list is a strut brace.
Maybe spring just before the Ring, I will put on a supercharger