🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX & STI Year: 2008 Codes Chassis Code: GD/GG Engine Codes Covered: EJ255 (WRX), EJ257 (STI) 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback (Sport Compact Rally-inspired) Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Honda Civic Si, Mazdaspeed3, Volkswagen GTI. Key Features Performance Orientation: Symmetrical All-Wheel Drive, turbocharged Boxer engines, sport-tuned suspension, iconic rally heritage. Trim Differentiation: WRX focused on strong performance and AWD for its price; STI offers enhanced engine internals, a more robust transmission, advanced DCCD (Driver Controlled Center Differential), larger brakes, and suspension tuning for ultimate track and rally performance. 📋 Manual Details Coverage Areas General: Engine, Body, Body Repair, Chassis, Mechanism and Function, STI Body, STI Body Repair, STI Chassis, STI Engine, STI General Information, STI Transmission, STI Wiring, Transmission, Wiring Page Count Estimated Pages: Extensive (Typical for factory service manuals covering multiple variants; exact count not specified but implied by zip file size and breadth of topics) Manual Type Type: Factory Service Repair Manual Language Language: English Format Digital Format: PDF 📖 Manual Coverage Systems Covered Powertrain: EJ255 (WRX) and EJ257 (STI) turbocharged Boxer engines, 5-speed manual (WRX) and 6-speed manual (STI) transmissions, all-wheel drive system (Symmetrical AWD), fuel system, exhaust system. Chassis And Suspension: Front and rear suspension components (struts, control arms, bushings), steering system, braking system (including ABS), wheel and tire specifications, chassis structural integrity. Body And Interior: Exterior body panels, doors, hoods, trunk, bumpers, interior trim, seating, airbags, HVAC system, body repair procedures, rust prevention and repair for STI specific bodywork. Electrical And Electronics: Complete wiring diagrams for all vehicle systems, starter, alternator, battery, lighting, ignition system, instrument cluster, infotainment system wiring, ECU and sensor wiring. Procedures Included Engine Maintenance And Repair: Engine oil and filter change, spark plug replacement, timing belt inspection/replacement (if applicable to specific engines), valve adjustment, cylinder head removal/installation, piston and connecting rod service, turbocharger diagnosis and repair. Transmission And Drivetrain: Clutch replacement, transmission fluid change, gearbox overhaul, differential service, driveshaft and CV joint inspection/replacement, AWD system maintenance. Brakes And Suspension: Brake pad and rotor replacement, brake caliper service, bleeding brake lines, suspension component replacement (struts, bushings), wheel alignment procedures, steering rack repair. Electrical Diagnostics: Troubleshooting electrical faults using wiring diagrams, diagnostic procedures for sensors and actuators, starter and charging system testing, repair of lighting circuits, ECU diagnosis. Body Repair: Panel replacement, dent repair, rust remediation, glass replacement, bumper repair and installation, body panel alignment. Diagnostics Troubleshooting: Detailed diagnostic trouble codes (DTCs), component testing procedures, symptom-based troubleshooting guides for engine, transmission, ABS, airbags, and other systems. Technical Depth Depth: Comprehensive: Covers routine maintenance, diagnostics, component removal and installation, complete disassembly and reassembly of major systems, and specialized STI performance component service. Includes detailed torque specifications, clearances, and diagnostic flowcharts. Engine Rebuild: In-depth procedures for complete engine teardown, inspection, and reassembly of EJ255 and EJ257 engines, including specific clearances, torque sequences, and assembly notes for high-performance components. Drivetrain Specialties: Detailed breakdown of the Symmetrical AWD system and the STI's DCCD, including maintenance, troubleshooting, and potential repair of differentials and center coupling. 📊 Manual Specifications File Format Format: PDF Print Quality Quality: High resolution, clear text and diagrams, suitable for printing specific sections or the entire manual. Binding Type Binding: N/A (Digital PDF format) Paper Type Paper: N/A (Digital PDF format) File Size Size Mb: 318 ⚙️ Engine Specifications Primary Engine Wrx Engine Type: EJ255 Configuration: 2.5L Turbocharged Horizontally-Opposed (Boxer) 4-cylinder Horsepower Hp: 224 hp @ 5200 rpm (approx.) Torque Lb Ft: 226 lb-ft @ 3600 rpm (approx.) Primary Engine Sti Engine Type: EJ257 Configuration: 2.5L Turbocharged Horizontally-Opposed (Boxer) 4-cylinder (STI specific, stronger internals, larger turbo) Horsepower Hp: 305 hp @ 6000 rpm (approx.) Torque Lb Ft: 290 lb-ft @ 3600 rpm (approx.) Fuel System Type: Sequential Multi-Port Fuel Injection (MPI) with Electronic Throttle Control. Valvetrain Type: DOHC (Dual Overhead Camshafts), 4 valves per cylinder, Subaru's Variable Valve Lift (VVL) on some STI models. 🔧 Transmission Standard Wrx Type: 5-speed Manual Transmission Standard Sti Type: 6-speed Manual Transmission Features Dccd Sti: Driver Controlled Center Differential (DCCD) for variable torque distribution between front and rear axles. Clutch Type: Hydraulic, single-plate dry clutch. Fluid Specifications Manual Transmission Fluid: Refer to manual for specific GL-4 or GL-5 gear oil specifications; Subaru Extra-S recommended or equivalent. 📐 Dimensions Exterior Sedan Length In: 173.8 (WRX), 174.4 (STI) Exterior Hatchback Length In: 174.3 (WRX), 175.0 (STI) Exterior Width In: 69.7 Height In: 57.1 (WRX), 57.5 (STI) Wheelbase In Wheelbase: 101.4 Weights Curb Weight Lbs: 3100-3300 (approx., varies by trim/body style) 🛡️ Safety Features Ratings NHTSA Frontal Crash: 5-Star (Driver and Passenger - typically for sedans) IIHS Moderate Overlap Front: Good (typical for this generation) Active Features Brake Assist: Yes (BA) Traction Control: Yes (TCS) Electronic Stability: Yes (Vehicle Dynamics Control - VDC) Passive Features Airbags: Front, Side Curtain, Front...