🏷️ Basic Information Identification Make: Subaru Model: Impreza WRX STI Model Code: GR/GV (Third Generation) Model Variant: STI (Turbocharged) Model Variant Non Turbo Mention: Impreza (Non-Turbo) - indicated by manual title, likely covering standard Impreza models as well for comparison/shared components. Codes Chassis Code: GR (Hatchback), GV (Sedan) Engine Codes: EJ257 (STI - Turbocharged), EJ20 (Non-Turbo variants) 👋 Introduction Market Position Segment: Performance Compact Sedan/Hatchback Usp Sti: Legendary Symmetrical All-Wheel Drive, turbocharged Boxer engine, rally-bred performance heritage, Driver-Controlled Center Differential (DCCD). Competitive Analysis Key Competitors 2007 2008: Mitsubishi Lancer Evolution, Subaru WRX (non-STI), Mitsubishi Eclipse GT, Volkswagen GTI, Mazdaspeed3. Key Features Performance Focus: Designed for enthusiasts seeking high performance, handling, and driver engagement. All Wheel Drive: Subaru's signature Symmetrical AWD system, crucial for traction and handling. Dccd: Driver-Controlled Center Differential (STI models) allowing manual adjustment of front-to-rear torque split. 📋 Manual Details Coverage Areas Covered Model Years: 2007, 2008 Covered Regions: Likely Global, with potential focus on markets where these models were prominent (e.g., North America, Europe, Japan). Page Count Estimated Page Count: Hundreds (as stated in description, typically 1000+ pages for comprehensive service manuals of this era). Manual Type Type: Service and Repair Manual Purpose: Repair, Maintenance, Rebuild, Refurbish, Restoration Language Language: English (assumed based on product description language) Format Format: PDF 📖 Manual Coverage Systems Covered Powertrain: Engine (EJ257/EJ20), Turbocharger System, Intercooler, Fuel System, Exhaust System, Drivetrain (AWD system, DCCD, differentials, axles), Transmission (6-speed manual). Chassis: Suspension (Front: MacPherson strut, Rear: Double wishbone), Steering (Power assisted), Brakes (ABS, Ventilated discs front/rear, Brembo calipers on STI), Wheels and Tires. Electrical: Engine Control Unit (ECU), Ignition System, Lighting (Headlights, Taillights, Interior), Gauges and Instruments, Power Accessories (Windows, Locks, Mirrors), Audio System, Wiper and Washer System, Cruise Control. Body And Interior: Body Panels, Doors, Hood, Trunk/Tailgate, Bumpers, Seats, Dashboard, Trim Panels, HVAC System (Heating, Ventilation, Air Conditioning). Procedures Included Routine Maintenance: Oil and Filter Changes, Air Filter Replacement, Spark Plug Replacement, Coolant Flush, Brake Fluid Flush, Differential Fluid Changes, Transmission Fluid Changes. Diagnostic Procedures: Troubleshooting guides based on symptoms, DTC (Diagnostic Trouble Code) interpretation and resolution, Electrical circuit testing, Component testing. Component Repair And Replacement: Engine rebuild procedures (e.g., piston, rod, bearing replacement), Turbocharger overhaul, Clutch replacement, Brake caliper and rotor replacement, Suspension component replacement (shocks, struts, bushings), Radiator replacement, Alternator and starter replacement. Bodywork And Collision Repair: Panel alignment, Dent repair, Rust treatment, Glass replacement, Trim component repair/replacement. Technical Depth Diagnostic Tools: Use of Subaru Select Monitor (SSM) or compatible OBD-II scanners. Torque Specifications: Detailed torque values for all fasteners (engine, chassis, suspension, brakes). Wiring Diagrams: Comprehensive electrical schematics for all systems. Service Bulletins: Likely includes reference to or summarization of TSBs (Technical Service Bulletins) relevant to the covered years. 📊 Manual Specifications File Format Searchability: Typically, PDF manuals are text-searchable, allowing quick access to specific terms and procedures. Printability: Generally printable, allowing for physical reference in a workshop environment. Print Quality Resolution: High resolution, ensuring clarity of diagrams, schematics, and images. Binding Type Digital Format: N/A (Digital PDF) Paper Type Digital Format: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Model Sti: EJ257 Configuration Sti: 2.5L (2457cc) DOHC turbocharged horizontally opposed (Boxer) 4-cylinder Non Turbo Mention: 2.0L EJ20 variants likely for standard Impreza models covered. Performance Sti Horsepower Sti: 305 hp @ 6000 rpm (SAE Net, North American Spec) Torque Sti: 290 lb-ft @ 3500 rpm (SAE Net, North American Spec) Fuel System Injection Type Sti: Multi-point fuel injection (MPI) with Electronic Fuel Injection (EFI), Top-feed fuel injectors. Fuel Type: Premium Unleaded Gasoline (91 Octane or higher recommended) Engine Management ECU Type: Engine Control Unit (ECU) with advanced engine management for turbocharging and AWD. 🔧 Transmission Standard Sti Type: 6-speed Manual Transmission (TY757) Optional Type: None for STI models in this generation. Features Dccd Integration: Integrated with DCCD for driver-selectable front-to-rear torque bias. Fluid Specifications Manual Transmission Fluid Sti: Subaru Genuine Gear Oil API GL-5 75W-90 or equivalent. Fluid Capacities Manual Transmission Capacity Sti: Approx. 2.7 Liters (2.9 US Quarts) 📐 Dimensions Exterior Sti Hatchback Length: 4,415 mm (173.8 in) Exterior Sti Sedan Length: 4,580 mm (180.3 in) Exterior Width: 1,795 mm (70.7 in) Height: 1,475 mm (58.1 in) (Hatchback), 1,440 mm (56.7 in) (Sedan) Wheelbase: 2,650 mm (104.3 in) Weights Curb Weight Sti Hatchback: Approx. 1,505 kg (3,318 lbs) Curb Weight Sti Sedan: Approx. 1,470 kg (3,241 lbs) 🛡️ Safety Features Ratings NHTSA Front Impact Driver: 5-Star (for equivalent 2008 Impreza models) NHTSA Front Impact Passenger: 5-Star (for equivalent 2008 Impreza models) IIHS Front Offset Crash Rating: Good (for equivalent 2008 Impreza models) Active Features ABS: Anti-lock Braking System (ABS) with EBD (Electronic Brake-force Distribution) Traction Control: Vehicle Dynamics Control (VDC) / Traction Control System (TCS) AWD: Symmetrical All-Wheel Drive enhances active safety. Passive Features Airbags: Frontal airbags (driver and passenger), Side curtain airbags (front and rear), Front...