Agree with E92Fan.
I have the Grey stock 135i 6-pot Brembo installed on my E90 335i.
Just had a track session @ Sepang
Braking performance def improved with progressive pedal feel, car's more stable during hard braking, with less fade. Lap time improved too!
Definitely an improvement over stock brakes overall even though it has smaller rotors.
Having said that, I would wait for a 335i Performance kit to be out.
