The SHW Performance Drilled Monobloc Rotors PRX39863 are high-performance brake rotors designed for use in high-performance vehicles. These rotors are made from a single piece of high-quality material, ensuring maximum strength and durability. They feature a drilled design, which helps to dissipate heat and improve overall braking performance. The PRX39863 model is specifically designed for use in high-performance vehicles, making it an ideal choice for those looking to upgrade their braking system. These rotors are compatible with a wide range of vehicles and are an excellent choice for those seeking improved braking performance.