StopTech 126.47029SL Power Slot WRX Rear Left Slotted Rotor. 2008-2014 Subaru Impreza WRX. 2010-2014 Subaru Impreza WRX Limited. The unique slotting aids with heat and brake dust dispersal, prevents glazing of the pads, adds bite and improves wet and dry braking performance.