🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STi Model Variant: WRX STi Year: 2008 Codes Chassis Code: GR/GV (Hatchback/Sedan) Engine Code: EJ257 👋 Introduction Market Position Positioning: The Subaru Impreza WRX STi is a performance-oriented compact car that competes in the enthusiast segment, known for its all-wheel-drive system, turbocharged engine, and rally-inspired heritage. Competitive Analysis Competitors: Mitsubishi Lancer Evolution, Volkswagen Golf GTI, Ford Focus RS, Mazdaspeed3. Key Features Performance Focus: This manual caters to owners and technicians who value the high-performance nature of the WRX STi and require detailed information for its upkeep and modification. Diy Support: Explicitly designed for both experienced DIY mechanics and professional technicians, offering comprehensive guidance. Value Proposition Value: Provides access to factory-level repair procedures and specifications, enabling owners to maintain or repair their WRX STi to original standards. 📋 Manual Details Coverage Areas Primary Coverage: Subaru Impreza WRX STi (2008 Model Year) Region Specific: Primarily North American and global specifications, with common international variations noted. Page Count Estimated Page Count: 1500-2000+ Manual Type Type: Factory Service Manual / Repair Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Powertrain: Engine, fuel system, ignition system, exhaust system, transmission (manual and automatic options), drivetrain (AWD system, differentials, drive shafts). Chassis: Suspension (front and rear, including STi specific components), steering, brakes (including ABS and performance brake systems), wheels and tires. Electrical: Starting and charging system, lighting, instrumentation, power accessories, body control modules, engine control module (ECM), transmission control module (TCM), infotainment systems, wiring diagrams. Body: Exterior body panels, interior trim, climate control system, safety restraint systems (airbags), glass and mirrors. Procedures Included Maintenance: Scheduled maintenance, fluid checks and changes, filter replacements, lubrication points. Diagnostics: Troubleshooting guides, symptom-based diagnostics, fault code interpretation (OBD-II), component testing procedures. Repair: Detailed step-by-step repair instructions for all major vehicle systems, including engine overhauls, transmission rebuilds, brake caliper replacement, suspension component replacement, electrical component repair. Assembly Disassembly: Comprehensive instructions for component removal and installation. Technical Depth Depth: Comprehensive, covering everything from basic fluid changes to complete engine and transmission rebuilds, including detailed diagnostic procedures and wiring schematics. 📊 Manual Specifications File Format Format: PDF Searchability: Text-searchable PDF for efficient information retrieval. Readability: High-resolution scans of original factory documentation, ensuring clear text and diagrams. Print Quality Quality: Designed for clear printing of all sections, including complex diagrams. Binding Type Type: N/A (Digital Download) Paper Type Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Horizontally-opposed (Boxer) 4-cylinder, turbocharged and intercooled. Displacement: 2.5 Liters (2457 cc) Bore X Stroke: 99.5 mm x 79.0 mm Compression Ratio: 8.4:1 Valve Train: DOHC, 16 valves, Variable Valve Timing (VVT). Performance Horsepower: 305 hp @ 6000 rpm (approx.) Torque: 290 lb-ft @ 4000 rpm (approx.) Fuel System Injection Type: Multi-point Fuel Injection (MPI) with Electronic Throttle Control (ETC). Fuel Requirement: Premium Unleaded Gasoline (91+ Octane Recommended) Turbocharger Turbo Model: IHI VF48 (or similar twin-scroll design) Intercooler: Top-mounted air-to-air intercooler. 🔧 Transmission Standard Transmission Type: 6-speed Manual Transmission (STi specific) Optional Transmission Type: N/A (STi models were exclusively manual for this generation) Features AWD System: Symmetrical All-Wheel Drive (AWD) with Driver Controlled Center Differential (DCCD) and Helical Limited Slip Front Differential (LSD) and Torsen Limited Slip Rear Differential. Fluid Specifications Manual Transmission Fluid: Subaru Genuine Gear Oil API GL-5, SAE 75W-90 (or equivalent) Fluid Capacities Manual Transmission Capacity: Approx. 3.5 Liters (3.7 US Quarts) 📐 Dimensions Exterior Length Hatchback: 4415 mm (173.8 inches) Length Sedan: 4580 mm (180.3 inches) Width: 1800 mm (70.9 inches) Height Hatchback: 1475 mm (58.1 inches) Height Sedan: 1475 mm (58.1 inches) Wheelbase: 2625 mm (103.3 inches) Weights Curb Weight: 1505 kg (3318 lbs) - Hatchback (approx.) Gross Vehicle Weight Rating: Approx. 1950 kg (4299 lbs) Wheels Tires Wheel Size: 18 x 8.5 inches (standard) Bolt Pattern: 5x114.3 mm (5x4.5 inches) Tire Size Standard: 245/40R18 (standard) 🛡️ Safety Features Ratings NHTSA Front Crash: 5 Stars NHTSA Side Crash: 5 Stars IIHS Frontal Offset: Good Active Features Traction Control: Yes (with Subaru Vehicle Dynamics Control - VDC) Electronic Stability Control: Yes (VDC) ABS: Yes, 4-wheel disc with Electronic Brake-force Distribution (EBD) and Brake Assist. Passive Features Airbags: Front dual-stage, front side-impact, side-curtain (front and rear), driver's knee airbag. Seatbelts: 3-point with pretensioners and load limiters, LATCH child seat anchors. 💡 Technology Features Infotainment Head Unit: Standard AM/FM/CD audio system, optional premium audio with subwoofer, Bluetooth connectivity (depending on trim and options). Navigation: Optional factory navigation system available on higher trims. Driver Assistance Cruise Control: Standard cruise control. Keyless Entry: Standard keyless entry and ignition. Connectivity Bluetooth: Available for hands-free calling and audio streaming. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 6 months (severe driving conditions), or 7,500 miles / 12 months (normal driving conditions), using synthetic oil. Air Filter Replacement: Every 15,000 - 30,000 miles or...