These Yamaha protective engine covers are not only stylish, they're high-quality and designed to help protect your investment. Made from long-fiber nylon 6-6 which is very strong, as well as being impact, chemical, and fire-resistant. Approved for racing by the FIM (sanctioning body for international racing like MotoGP and WSBK) and the AMA. Covers install directly over the stock engine covers (no need to remove). Cover set includes all 3 engine covers. Easy installation and includes all necessary hardware.