1999-2002 Subaru EJ207 JDM Turbo Engine & 5-Speed Manual Transmission Swap

Unlock the ultimate performance potential of your GC8 or GD chassis with this legendary JDM Subaru EJ207 Turbo Engine and 5-Speed Manual Transmission Swap. Often referred to as the holy grail of Subaru flat-four engineering, the EJ207 is built with forged internals, high-flow cylinder heads, and a higher factory redline compared to domestic counterparts. Sourced directly from low-mileage Japanese donor vehicles, this complete high-performance "clip" provides the raw, rally-bred power and bulletproof reliability that Subaru enthusiasts demand. Whether you are performing a complete drivetrain swap or a performance restoration, this authentic JDM-spec setup offers a dramatic increase in throttle response, top-end power, and overall driving engagement.

Vehicle Specifications

• Year Range: 1999, 2000, 2001, 2002

• Make & Model: Subaru Impreza WRX / STI (GC8 / GDB Chassis)

• Engine Code: EJ207 (2.0L Turbocharged DOHC Flat-4)

• Transmission: 5-Speed Manual Performance Gearbox

• Internals: Factory Forged Pistons & High-Flow Head Assembly

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

• Condition: Premium Used Performance Import (Compression tested, leak-down verified, transmission gear-synch verified, and clean oil delivery)

Vehicle Fitments

• Direct Fitment: 1999-2002 Subaru Impreza (GC8 / GDB chassis).

• Swap Compatibility: Widely used for performance swaps into US-spec 2.5RS or WRX chassis.

• Conversion Note: This is an engine and transmission package designed for enthusiasts. Swapping into non-turbo chassis requires matching the ECU, wiring harness integration (AVCS support), and fuel system upgrades to accommodate the EJ207’s high-performance requirements.

Included Parts

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

• Turbo System: Factory-matched turbocharger and tubular exhaust manifold

• Transmission: 5-Speed Manual AWD gearbox assembly

• Ancillaries: Alternator, power steering pump, A/C compressor, and coil packs

• Electronics: Factory engine-side wiring harness and ECU (where available)

Installation & Conversion Notes

• Fueling: The EJ207 is high-compression and requires mandatory 93+ octane premium gasoline. We strongly recommend upgrading your fuel pump (e.g., Walbro 255/450) and ensuring your fuel injectors are properly sized for the engine's power output.

• Cooling: To preserve the long-term health of this engine, a high-capacity aluminum radiator and an upgraded front-mount or top-mount intercooler are highly recommended, especially for spirited or track-use vehicles.

• AVCS (Active Valve Control System): This engine features AVCS. If your chassis did not come equipped with AVCS, you will need to utilize a supported standalone ECU or an AVCS-compatible wiring harness to take advantage of the engine's variable valve timing.

• Maintenance: Before startup, install a fresh timing belt kit (including pulleys and tensioner), high-quality water pump, and full-synthetic 5W-40 oil to ensure peak performance and longevity.