yea running the CSL / Z4M rotor is also possable on the front which is a tad bigger than what is on the kit that you are running, you just need to add a 5MM spacer on the carriers as i did mine, fills the wheel super nice.
the car also had shown no ill effects or further travel on the brake pedal. so im thinking this is a great cheap brake mod for the money.
you can get the 1 series brake calipers off of 1 addicts site for super cheap as they come up often.
scored a rear and front setup then all i had to buy was the rotors which can get pricey
but all in all i was out 750 dollars total. but what an upgrade!
easy to swap as well.
thanks for the DIY.