The DBA Street Series T2 slotted rear rotor for 2013–2015 BMW 328i (with M Sport) uses the patented T2 slot to provide a more responsive, quieter and smoother brake pedal feel. Bi-symmetrical CNC-machined slots increase exit paths for dust and gases and enhance pad bite while eliminating separate left/right slot designs. It's recommended for more intensive braking demands and fits as a direct replacement.
DBA 13-15 BMW 328i (w/M Sport Package) Rear Slotted Street Series Rotor