The EBC Brakes USR Slotted Rotor Sets USR1817 are a set of high-performance brake rotors designed for use in various vehicles. These rotors are slotted, which helps to improve overall braking performance by reducing heat and gas buildup. The USR1817 set includes two front rotors and two rear rotors, each with precision-machined slots that provide better bite and braking power. These rotors are made from high-quality materials and are designed to be durable and long-lasting. They are a great choice for drivers looking to upgrade their braking system for improved performance and reliability.