Subaru Impreza WRX STI V7 EJ207 2.0L DOHC Turbo Engine Complete Wiring Harness & ECU JDM

Experience the legendary performance of the Japanese Domestic Market with this Complete JDM 2002-2007 Subaru Impreza WRX STI Version 7 EJ207 Engine Swap Package. This is the ultimate "drop-in" solution for enthusiasts looking to achieve true JDM STI power. Unlike the standard US-spec EJ20/EJ25 engines, the V7 EJ207 features high-revving internals, an aggressive camshaft profile, and a sophisticated factory ECU map designed for high-octane performance. This complete package includes the engine long-block, the full JDM engine-to-dash wiring harness, and the matching JDM STI ECU, providing a streamlined path for a fully operational swap into your GD/GG chassis. Sourced from a low-mileage Japanese donor, this engine has been compression-tested and verified to ensure maximum reliability and factory-spec power output.

Vehicle Specifications

• Year Range: 2002, 2003, 2004, 2005, 2006, 2007

• Make & Model: Subaru Impreza WRX STI (JDM GDB / Version 7 Platform)

• Engine Code: EJ207 (2.0L DOHC AVCS Turbocharged Boxer)

• Horsepower/Torque: Factory JDM STI Rated (Approx. 280hp / 309lb-ft)

• Redline: 8,000 RPM high-revving factory capability

• Wiring System: Complete JDM engine bay and bulkhead wiring harness

• ECU: Genuine JDM Version 7 STI (tuned for AVCS and high-performance fuel maps)

• Origin: Japan (Genuine Japanese Domestic Market Performance Import)

• Condition: Premium Used Performance Import (Compression tested, leak-down verified, timing belt/seals inspected)

Vehicle Fitments

• Direct Swap Fitment: 2002-2007 Subaru Impreza WRX / STI (GD Sedan & GG Wagon).

• Compatibility: Designed for compatibility with all 5x100 and 5x114.3 hub GD/GG chassis.

• Note on Wiring: While the included harness is complete, installing a JDM engine harness into a USDM chassis requires professional-grade integration or "merging" of the JDM bulkhead harness with your existing USDM dashboard harness to ensure the speedometer, fuel gauge, and climate control systems function correctly.

Included Parts

• Engine Assembly: Complete EJ207 long-block with intake manifold, fuel rails, and turbocharger

• Electronics: Full JDM engine-to-cabin wiring harness (bulkhead included)

• Engine Management: Genuine JDM Version 7 STI ECU

• Ancillaries: Alternator, power steering pump, ignition coils, and mass airflow sensor (MAF)

• Bonus Components: Factory JDM intercooler and BOV assembly (when available)

Installation & Conversion Notes

• AVCS Integration: The EJ207 utilizes Active Valve Control System (AVCS). Ensure your vehicle's oil feed lines are properly connected and that your ECU is correctly configured to activate the AVCS solenoids for full mid-range torque delivery.

• Fuel Quality: This JDM engine is factory-tuned for high-octane Japanese fuel. It is mandatory to utilize 93+ octane premium gasoline at all times. Professional dyno-tuning or a specialized "JDM swap" calibration is highly recommended upon installation to account for local fuel quality and ambient temperature variances.

• Harness Merging: We recommend professional harness merging services. Do not attempt to "plug-and-play" the JDM bulkhead harness into a USDM dashboard, as pinouts differ significantly and can cause electrical shorts.

• Maintenance: Prior to the initial engine startup, perform a full fluid flush, install a new timing belt, water pump, and fresh synthetic 5W-40 oil to ensure maximum longevity of your new power plant.