Optimise ACS or not

ChawenHalo

Senior member
 Bordeaux
My favourite toys has already ACS diffuser, back exhaust boxes and side skirts and lightly upgaded brakes.

I'm reasonably a begginner at doing trackdays and doing (more and more) so my notion is clearly on spending the money on me rather than the car but in theory, am I better off upgrading to:

ACS suspension and 19" forged wheels
therefore keeping the car ACS
there own braking system eventually

or

Rays TE37 SLS 18"
KV 3/ Clubsports etc
AP Racing 6 pots

I don't intend to sell the car, but you never know...

Would be grateful for all your opinions
 
would look stupid with 19" wheels on the track anyway no?

What about the difference between a reputable tuners coilovers (set up for the Z4M) and getting a set of KW etc? surely getting all this nitty gritty set up is a hell of a job (of which I know next to nothing)
 
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