The 2004 Subaru WRX STI represents the pinnacle of rally-bred performance for its era, embodying Subaru's rich motorsport heritage. This iconic model, part of the second generation (GDB), is distinguished by its potent EJ257 2.5L turbocharged boxer engine, producing 260 horsepower and 290 lb-ft of torque, paired with a precise 6-speed manual transmission and Subaru's legendary Symmetrical All-Wheel Drive system featuring Driver's Control Centre Differential (DCCD). Its performance-tuned suspension and robust braking system, combined with a compact and aerodynamic chassis, make it a formidable machine for both spirited driving and track-day enthusiasts.

This comprehensive Workshop Service Repair Manual provides extensive coverage for the 2004 Subaru WRX STI, offering over 1500 pages of detailed information for owners and technicians. It covers all aspects of the vehicle, including in-depth engine mechanicals and performance tuning, drivetrain components, suspension, steering, braking systems, and intricate electrical systems with detailed wiring diagrams. The manual also includes routine maintenance schedules, repair and overhaul procedures for major components, diagnostic guides, and essential technical specifications, ensuring that every aspect of the WRX STI can be maintained, diagnosed, and repaired with accuracy and efficiency.