🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Year: 2008 Codes Chassis Code: GRF Generation Generation Code: Third Generation (GR/GH/GE) Generation Notes: The manual is stated to be suitable for other years of manufacture within this generation, implying broad applicability to GR/GH/GE chassis variants around 2008. 👋 Introduction Market Position Vehicle Segment: Performance Compact Sedan/Hatchback Competitors: Mitsubishi Lancer Evolution, Subaru WRX (non-STI variants), Ford Focus RS (later generations), Volkswagen Golf GTI (performance variants), Honda Civic Type R. Key Features Drivetrain: Symmetrical All-Wheel Drive (AWD) Engine: Turbocharged Boxer Engine Performance Orientation: High-performance variant of the Subaru Impreza, focused on motorsport and enthusiastic driving. Manual Value Proposition Technician Equivalent: This manual is the same type used by technicians at Subaru dealerships, ensuring accurate and professional repair information. 📋 Manual Details Coverage Areas Coverage Scope: Complete FSM (Factory Service Manual) covering diagnosis, maintenance, adjustments, service operations, component replacement, disassembly, and assembly of major components. Page Count Estimated Page Count: N/A (Digital Download - extensive content) Manual Type Type: Workshop Manual / Factory Service Manual (FSM) Language Language: English Format File Format: RAR (containing PDF files) Software Requirements: WinRAR or WinZip for extraction, PDF reader 📖 Manual Coverage Systems Covered Engine Mechanical: Yes Engine Lubrication And Cooling: Yes Engine Fuel And Emission Control: Yes Accelerator Control: Yes Fuel And Exhaust Systems: Yes Clutch: Yes Manual Transmission: Yes Automatic Transmission: Yes Propeller Shaft And Differential: Yes Front Axle: Yes Rear Axle: Yes Front Suspension: Yes Rear Suspension: Yes Brake System: Yes Steering System: Yes Restraint System: Yes Body And Trim: Yes Heater And Air Conditioner: Yes Electrical System: Yes Engine Control Module Etc: Yes Procedures Included Diagnosis: Yes Maintenance: Yes Adjustments: Yes Service Operations: Yes Component Replacement: Yes Disassembly And Assembly: Yes (Major Components) Troubleshooting: Yes (implied by diagnosis and service operations) Technical Depth Depth: Comprehensive (dealer-level technician information) Detail Level: Includes detailed procedures, diagrams, and specifications for repairs and maintenance. 📊 Manual Specifications File Format Compression Type: RAR Document Format: PDF Compatibility: All Versions of Windows & Mac* Searchability: Likely searchable if PDF is text-based, not guaranteed for scanned images. Print Quality Quality Description: N/A (Digital download; print quality depends on user's printer) Binding Type Type: N/A (Digital Download) Paper Type Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: EJ257 (likely for GRF chassis) Engine Type: 2.5L Turbocharged Boxer-4 DOHC Performance Horsepower: Approx. 305-315 hp (specifications can vary slightly by market/region) Torque: Approx. 290 lb-ft (specifications can vary slightly by market/region) Fuel System Fuel Delivery: Multi-point Fuel Injection (MPI) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) Cooling System Coolant Type: Subaru Super Coolant (Blue) or equivalent silicate-free, long-life coolant. Lubrication System Oil Type Recommendation: Refer to manual for specific viscosity (e.g., 5W-30, 10W-30, depending on climate and application). High-performance synthetic oil is recommended. Maintenance Items Spark Plugs: NGK Iridium IX (e.g., PFR7B or similar, verify for specific model year/engine variant) 🔧 Transmission Standard Type: 6-Speed Manual Transmission (TY856 Series) Optional Type: N/A (STI models typically came standard with a 6-speed manual) Features Differential: Center Differential with DCCD (Driver Controlled Center Differential), Front Helical Limited-Slip Differential (LSD), Rear Helical Limited-Slip Differential (LSD). Fluid Type Manual Transmission Fluid: Refer to manual for specific GL-5 gear oil specifications and viscosity (e.g., Subaru Extra-S or equivalent). Rear Differential Fluid: Refer to manual for specific GL-5 gear oil specifications and viscosity. 📐 Dimensions Exterior Body Styles: 4-Door Sedan, 5-Door Hatchback Weights Curb Weight: Approx. 3,350 - 3,450 lbs (depending on body style and options) 🛡️ Safety Features Ratings NHTSA Crash Test Results: Refer to specific NHTSA reports for 2008 Subaru Impreza WRX STI. Generally, Subaru vehicles of this era performed well in frontal and side impacts. Active Features Traction Control: Yes (likely with selectable modes) Electronic Stability Control: Yes (likely with selectable modes) Antilock Braking System: Yes (ABS) Passive Features Airbags: Front airbags, side airbags, curtain airbags (depending on trim/options). 💡 Technology Features Infotainment Audio System: Factory-installed audio system with CD player, radio, and speaker configuration (upgrades available). Driver Assistance Dccd: Driver Controlled Center Differential allowing manual adjustment of the center differential lock-up percentage for varying traction conditions. Connectivity Auxiliary Input: Likely includes an auxiliary audio input jack for connecting external devices. 🔧 Maintenance Service Intervals Oil And Filter Change: Refer to manual; typically every 3,750 - 5,000 miles or 6 months, whichever comes first. High-performance driving may necessitate more frequent changes. Engine Air Filter Replacement: Refer to manual; typically every 15,000 - 30,000 miles or as needed based on driving conditions. Timing Belt Replacement: N/A (EJ257 uses a timing chain or belt system requiring periodic inspection and replacement based on mileage and age, e.g., 105,000 miles for timing belt) Transmission Fluid Change: Refer to manual; typically every 30,000 - 50,000 miles. More frequent for severe use. Fluid Specifications Coolant Capacity:...