WHAT’S IN THE KIT: 2x Front Disc Brake Rotor 681781FZN. Brake Disc Specifications Brake Disc Type: Ventilated. Brake Disc Thickness [mm]: 33.1. ENGINEERED FOR SUPERIOR PERFORMANCE: Our parts are manufactured to exceed OEM specifications, backed by IATF 16949 and ISO 9001 certifications for exceptional reliability and quality.