StopTech Slotted Sport Brake Rotor (Rear Right). Part Number: 126.42101SR. This is a single premium replacement performance rotor. Features: 1x Slotted Rear Right Brake Rotor (126.42101SR). High-carbon metallurgy for reduced noise and increased power, directional slotting to evacuate gases and dust, and an e-coating finish for superior corrosion resistance. Designed specifically for vehicles equipped with Akebono Sport Brake calipers (350mm diameter).