The Centric Parts 15.35" Disc Brake Rotor is the perfect choice for Blue Bird and GMC vehicles. This rotor is designed with split-core castings and a symmetric vane for consistent heat dispersion and has a black e-coat anti-corrosive coating. The double disc ground friction surface ensures the best results and service life. This rotor is sure to provide superior performance and reliability. FleetPride is your First Click in Heavy Duty®.