All EBC rotors including these USR Slotted / Grooved 294mm Front Rotors for Toyota GT86, Subaru BRZ & Impreza WRX (UK model) are British made and are precision machined in the UK. Rotors are made from high quality grey iron to exacting standards and undergo extensive testing and rigorous quality control. Slotted rotors can significantly improve brake performance and longevity when used with a high friction brake pad set. Having sold hundreds of thousands of brake kits EBC Brakes feel confident their approach is as perfect as it gets.