This manual covers the Mitsubishi Lancer Evolution VIII, often referred to as the Evo 8, produced for the 2003, 2004, and 2005 model years. As a performance sedan and rally homologation special, the Evo 8 is renowned for its legendary handling, powerful 4G63T turbocharged engine, and advanced all-wheel-drive system, including Active Center Differential (ACD) and Active Yaw Control (AYC). Its design is directly influenced by World Rally Championship (WRC) homologation requirements, making it a highly capable and sought-after vehicle for enthusiasts and performance driving. This comprehensive Workshop Repair Service Manual in English provides detailed information for the service, maintenance, troubleshooting, and repair of the Lancer Evolution VIII (CT9A chassis code). It covers all major systems, including the 2.0L turbocharged engine, 6-speed manual transmission, sophisticated AWD drivetrain, suspension, brakes, steering, and electrical systems. The manual includes essential procedures such as scheduled maintenance, fluid changes, component removal and installation, diagnostic charts, and technical specifications, offering invaluable guidance to owners and technicians for keeping the vehicle in optimal condition.