Link G4X Plug-In ECU Subaru WRX STI GR GV GH GE VAB

The Link G4X Plug-In ECU for Subaru WRX and WRX STI is a direct replacement ECU designed to install inside the factory enclosure with no wiring modifications required. It provides full standalone engine management while retaining most factory sensors and key systems.

This ECU is suited to turbocharged EJ20 and EJ25 engines and is ideal for performance street and track builds. It delivers reliable tuning control and motorsport features while maintaining factory integration, without the complexity of a full wire-in ECU.

Why Choose a Plug-In ECU

• No wiring modifications required
• Retains most factory sensors and systems
• Faster installation compared to wire-in ECUs
• Ideal for street and performance builds

Supported Vehicles

• Subaru WRX and WRX STI 2007 to 2014 GR GV GH GE chassis
• Subaru WRX STI 2015 to 2021 VAB VAF chassis
• Turbocharged EJ20 and EJ25 engines

Key Features

• Direct plug-in ECU with factory fitment
• Up to 6D fuel and ignition mapping
• Sequential fuel injection
• Closed loop cam control
• 5D boost control with multiple tables
• Motorsport features including antilag, launch and flat shift
• CAN bus support
• 512MB onboard logging memory
• QuickTune automated fuel tuning
• Individual cylinder fuel and ignition correction
• Dual fuel, ignition and boost maps

Factory Feature Support

• DCCD control
• SI Drive
• Cruise control
• ABS integration
• Cam control systems
• Hill start assist

Important Notes

• Manual transmission only
• Check connector matches before purchase
• Air temperature sensor recommended
• Immobiliser light may remain on in some models
• Refer to PCLink configuration memo before installation

Communications

• USB tuning connection
• CAN bus via 4 pin powered connector

Logging and Control

• 512MB logging memory
• Real time tuning via PCLink software
• Stats recording and diagnostics

I/O Expansion

• Aux 16 output
• Digital input 11
• Analog temperature input 4
• Knock input 2
• Injector 6 output