I'm pretty sure the rotors were original on my 2015 F30 N55 xDrive ///M Sport with blue ///M Sport calipers (~62k miles) so I decided to upgrade the rotors to the Power Stop Evolution Z23. Sure, I know cross-drilling and slotting adds little if any performance benefit, but man they sure look cool! Pads were changed at 37k and have a good bit of meat left on them so I reused all the pads and sensors.
This is not a track car so I don't need two-piece rotors. And since one-piece rotors are essentially hunks of steel without much tech involved in their development, I decided to go with the Power Stops since they were less than half the price of the equivalent StopTech rotor. Mine are 370mm front (Power Stop #EBR1438XPR) and 340mm rear (Power Stop #EBR1416XPR) and I got all four delivered Rockauto for $321!!
I will not make this a DIY b/c the one
Daggers made was more than thorough enough.
https://f30.bimmerpost.com/forums/sh....php?t=1464075
Installation: Straight forward. BMW (at least on the M Sport calipers) has started using a design similar to Porsche where you can remove the pads from the caliper without removing the caliper from the rotor so that was refreshing to see and will be handy when I need to eventually replace the pads. Getting my spacers off required using my wife's hairdryer and getting the rotors off required a couple good wacks with rubber mallet. Space was a bit tight on the rear when trying to retorque the caliper bolts, but I made it work.
Fit and finish: The rotors look great and fit well. Zero issues whatsoever. Packaging was good from Power Stop as well as Rockauto (which had free 2 day shipping, btw).
Performance: I immediately bedded them in, and they're working great. No issues whatsoever. No squeaking, squealing, humming, vibrating, etc. Stopping power is essentially the same as OEM b/c, again, rotors don't do much for stopping especially if using the same pads.
Value: A++++++++. I've only had them on a week, but I can't fathom why anyone would pay double or even triple for StopTech or OEM [one-piece] rotors. These things are awesome. They went on fine, look great, and work well. What more can I say?
(Rear install was interrupted by the sound of ghetto birds overhead...once I realized it was the BLM protestors who were just 8 blocks away, I had to make a necessary addition to my tool set
)