I fitted the M performance for around $3000USD
actually, looks aside, the stopping power is similar to the M sport on the M135i
it does however has a different linear characteristic, the M performance feel more straight as oppose to the M sport feels weaker at first and exponentially stronger as you push hard, and the pads on the M performance feel a bit harder
is it worth the money, probably not if you already have the M sport
but if you can find someone to buy your M sport like I did, then its worth considering
I kinda got it for the looks
if the stopping power is not enough for you, then go get some proper 6 pistons
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