Peak Slotted Vented 1-Piece Rear Brake Rotors (V15-4003-BP) by SP Performance®. Quantity: 2 Per Pack. SP Performance Slotted Brake Rotors provide great stopping power, while looking amazing. The slots on the brake rotor surface are used to expel the brake dust away from your braking surface and wheels, keeping the braking surface cooler. All SP Performance Brake rotors are machine balanced and disc ground and meet OEM specification. The Slotted Brake rotors are direct replacements to your existing brake rotors and require no brake system modifications.