🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Model Variant: WRX STI Model Year: 2008-2009 Codes Chassis Code Sti: GRF/GVF Chassis Code Wrx: GEF/GEF 👋 Introduction Market Position Segment: Performance Compact / Rally Sport Target Audience: Enthusiasts, performance drivers, rally fans, Subaru performance vehicle owners. Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Volkswagen Golf GTI/R32, Mazdaspeed3, Ford Focus RS Key Features Performance Focus: Emphasis on turbocharged boxer engines, Symmetrical All-Wheel Drive, and rally-bred handling dynamics. Manual Value Proposition: Provides factory-accurate information for maintaining and repairing these specialized performance vehicles, crucial for preserving their integrity and performance. 📋 Manual Details Coverage Areas Coverage: Complete vehicle service and repair Page Count Estimated Page Count: Approximately 2000+ pages (typical for factory service manuals of this era) Manual Type Type: Factory Service Manual (FSM) / Workshop Manual Language Language: English Format Format: Digital Download (PDF) 📖 Manual Coverage Systems Covered Engine: EJ257 (2.5L Turbocharged DOHC Boxer - STI), EJ255 (2.5L Turbocharged DOHC Boxer - WRX) Transmission: 6-speed Manual Transmission (STI), 5-speed Manual Transmission (WRX) Drivetrain: All-Wheel Drive (Symmetrical AWD), Differential systems (front, center, rear), Axles, Driveshafts Suspension: Front MacPherson struts, Rear double wishbone, Springs, Dampers, Bushings, Sway bars, Alignment procedures Brakes: Front and rear disc brakes, ABS system, Brake fluid service, Caliper and rotor replacement, Parking brake system Steering: Power-assisted rack and pinion, Steering column, U-joints Electrical: Battery, Charging system, Starting system, Ignition system, Lighting systems, Fuses, Relays, Wiring diagrams, ECUs, Body Control Module (BCM) Fuel System: Fuel pump, Injectors, Fuel pressure regulator, Fuel lines, Evaporative emission control (EVAP) Cooling System: Radiator, Water pump, Thermostat, Coolant, Hoses, Fan system Exhaust System: Catalytic converter, Mufflers, Exhaust pipes, Oxygen sensors HVAC: Air conditioning, Heating, Ventilation, Blower motor, Evaporator, Compressor, Refrigerant service Body And Trim: Exterior panels, Doors, Hood, Trunk, Bumpers, Interior trim, Seats, Glass Safety Systems: Airbag system, Seatbelts, Pre-tensioners Procedures Included Maintenance: Scheduled maintenance, Oil changes, Filter replacements, Fluid checks and changes, Spark plug replacement Diagnostics: Troubleshooting guides, Diagnostic trouble codes (DTCs) interpretation, Fault finding procedures Repair: Component removal and installation, Engine rebuilds, Transmission overhauls, Suspension component replacement, Brake service, Electrical system repairs Special Tools: Identification and usage of Subaru-specific special tools Torque Specifications: Detailed torque values for critical fasteners Wiring Diagrams: Comprehensive electrical wiring diagrams Technical Depth Depth: Comprehensive factory-level diagnostic and repair procedures, suitable for professional technicians and experienced DIY enthusiasts. 📊 Manual Specifications File Format Format: PDF Searchability: Typically fully searchable text, allowing for quick access to specific topics. Print Quality Quality: High-resolution scanned pages, often replicating the clarity of the original printed manual. Binding Type Binding: Not applicable (digital download) Paper Type Paper Type: Not applicable (digital download) ⚙️ Engine Specifications Primary Engine Sti Engine Code: EJ257 Configuration: 2.5-liter turbocharged, DOHC, 16-valve, horizontally opposed (boxer) four-cylinder Bore X Stroke: 99.5 mm x 79.0 mm Compression Ratio: 8.4:1 Horsepower Hp: 305 hp @ 6000 rpm Torque Lb-Ft: 290 lb-ft @ 4000 rpm Primary Engine Wrx Engine Code: EJ255 Configuration: 2.5-liter turbocharged, DOHC, 16-valve, horizontally opposed (boxer) four-cylinder Bore X Stroke: 99.5 mm x 79.0 mm Compression Ratio: 8.4:1 (some variations may exist) Horsepower Hp: 265 hp @ 6000 rpm (USDM) Torque Lb-Ft: 247 lb-ft @ 4000 rpm (USDM) Performance Induction: Twin-scroll turbocharger (STI), Single-scroll turbocharger (WRX), Top-mount intercooler Fuel System Fuel Delivery: Electronic Multi-Port Fuel Injection (MPI) Fluid Specifications Engine Oil Type: API SG or SH or SJ or SL or SM or SN classification, SAE 5W-30 synthetic or synthetic blend. Check manual for specific viscosity grades for ambient temperatures. Coolant Type: Subaru Super Coolant (or equivalent ethylene glycol-based coolant with Subaru anti-corrosion additives) Known Issues Piston Ring Land Failure: A known potential issue in EJ257 engines, particularly with aggressive tuning or sustained high-load operation, leading to oil consumption and compression loss. Manual details proper inspection and potentially updated parts/procedures. Head Gasket Leaks: While less common than earlier generations, can occur. Manual covers diagnosis and replacement procedures. 🔧 Transmission Standard Sti Type: 6-speed Manual Transmission (TY856WB1AA) Standard Wrx Type: 5-speed Manual Transmission (EX195) Features Sti AWD System: Driver Controlled Center Differential (DCCD) with automatic mode for torque distribution. Wrx AWD System: Viscous coupling center differential (VCD) with automatic torque distribution. Fluid Specifications Sti Transmission Fluid: API GL-5, SAE 75W-90 synthetic gear oil. Manual specifies Subaru Extra-S or equivalent. Wrx Transmission Fluid: API GL-5, SAE 75W-90 synthetic gear oil. Rear Differential Fluid: API GL-5, SAE 75W-90 synthetic gear oil. 📐 Dimensions Exterior Sti Length: 4415 mm (173.8 in) Width: 1795 mm (70.7 in) Height: 1470 mm (57.9 in) Wheelbase: 2625 mm (103.3 in) Exterior Wrx Length: 4415 mm (173.8 in) Width: 1795 mm (70.7 in) Height: 1470 mm (57.9 in) Wheelbase: 2625 mm (103.3 in) Cargo Trunk Capacity Liters: Approximately 300-315 L (10.6-11.1 cu ft) depending on specific configuration Weights Curb Weight Sti: Approximately 1505 kg (3318 lbs) Curb Weight Wrx: Approximately...