The WRXLink V5-6 (WRX6X) is Link Engine Management’s G4X plug-in ECU for the Subaru Impreza WRX and STI V5 and V6 (GC8F/GC8G) with the EJ20 engine. No AVCS on these generations. Factory MAP sensor supported via An Volt 1 (limited to ~125 kPa / 18 psi) — an external MAP sensor is recommended for modified builds. IAT sensor addition is highly recommended.
CAN cable note (firmware V1.4+): This plug-in uses a 4-pin powered CAN connector from PCLink firmware V1.4 onwards. Use the CANJST4 cable (101-0198) for CAN devices — the older CANPCB cable is not compatible on V1.4+ units.
Vehicle Fitment
| Vehicle | Chassis | Engine | Years |
|---|---|---|---|
| Subaru WRX / STI V5 | GC8F | EJ20 | 09/1998–08/1999 (MY99) |
| Subaru WRX / STI V6 | GC8G | EJ20 | 09/1999–08/2000 (MY00) |
Manual transmission only.
Key Specifications
| Property | Value |
|---|---|
| SKU | 228-4000 |
| Link model code | WRX6X |
| Onboard MAP sensor | No — factory MAP (~125 kPa); external recommended |
| AVCS cam control | Not applicable |
| CAN cable | CANJST4 (101-0198) required on V1.4+ firmware |
| Transmission | Manual only |
| CAN buses | 2 |
| Base map | Included |
| Software | PCLink G4X (free) |
Recommended Accessories
- Link XS Expansion Loom — external MAP and IAT sensor connections
- LinkECU CAN Lambda Controller — wideband lambda via CAN (CANJST4 cable required)
Easy to install. Affordable. Reliable.
G4X PlugIn ECUs offer the latest in engine management technology, designed to easily maximize the potential from your car.
This ECU fits inside the factory OEM enclosure. Installation is a breeze, with no alteration of the factory wiring loom required for the models listed below.
Please check your pinout matches the header in the listed photo before purchasing.
- This ECU works for manual transmissions only.
- Air temp sensor highly recommended.
- Most factory features are supported.
- Check the features tab for I/O expansion options
- Note: V1.4 onwards of this Plug-in features a new 4 pin powered CAN connector and cannot use the old CANPCB cable for CAN connection. Use the CANJST4 (Code 101-0198) cable for connecting CAN devices. This new 4 pin port and cable provides not only the CAN connection, but also a protected 12V power supply and ground for powering the CAN devices. The power supply is protected by a self-resetting fuse rated at 3A continuous.
Suitable Applications:
- GC8F
- GC8G
- WRX and STI from 09/1998 to 08/00
- MY99 & MY00












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