StopTech Sport Slotted Brake Rotors are 1-piece direct replacement brake discs for your factory brake system and stock calipers. These rotors feature a directional left-hand slotting that helps wipe away debris, dissipate heat, and improve wet weather braking performance. This specific part is a single Rear Left side rotor. Specifications: Position: Rear Left; Style: Slotted; Quantity: 1 Rotor. Compatible with Audi S5 (2008-2017) and related B8 platform vehicles equipped with 330mm rear discs.