EBC BSD Rear Rotors (280x11mm) 2007 2013 Mazda Mazdaspeed3 2.3T. EBC BSD rotors feature a "V" pattern which improves heat dispersion and helps the pads run cooler on average over OE style rotors. BSD rotors are a perfect addition to any vehicle looking to add performance and style to any vehicle. Quantity: 2 brake rotors per pack. EBC Blade Brake High Carbon BSD Rotors High Carbon Disc for Performance Street & Race Use British Cast and Machined for Reduced Vibration Twice the Carbon Content Improves Thermal Stability Corrosion Resistant Geomet Dry Powder Coat Finish Rotor Finish Helps Aid in Fast Pad & Rotor Break In New Vee Slot Design removes Dirt & Gases Dynamically Balanced to Reduce Vibration The Uniquely created blade slot design helps to remove hot gases from the braking zone in a quick and efficient way much more so than a uni directional slot. This helps to keep the pads flatter and the brakes cooler. The function of the multiple overlap slots reduce the brake wind noise.