This manual covers the Lancer Evolution X (Evo 10) models produced for the North American and European markets from 2008 to 2010. The Evo X is a performance-focused sedan renowned for its advanced Super All-Wheel Control (S-AWC) system, potent 4B11T turbocharged engine, and aggressive, rally-bred design. It represents a significant evolution in the Lancer Evolution lineage, blending sophisticated technology with exhilarating driving dynamics. This vehicle is engineered for enthusiasts and performance driving, building on a rich motorsport heritage, particularly in World Rally Championship. This comprehensive workshop service manual provides essential technical information for the maintenance, diagnosis, and repair of the Lancer Evolution X. It details all major systems, including the engine, transmissions (manual and TC-SST), suspension, brakes, steering, and electrical systems. Within its approximately 2500+ pages, you will find detailed procedures for scheduled maintenance, troubleshooting common issues, component replacement, and adjustments, along with necessary special tools. This manual is an invaluable resource for owners, mechanics, and technicians seeking to preserve the performance and integrity of their Evo X.