Link G4X Plug-In ECU Subaru WRX STI V3 V4 EJ20

The Link G4X Plug-In ECU for Subaru WRX and STI V3 to V4 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 EJ20 engines and is ideal for performance street and track builds. It delivers reliable tuning control and motorsport features while maintaining factory integration.

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 STI GC8D GC8E
• 1996 to 1998 EJ20 models

Key Features

• Direct plug-in ECU with factory fitment
• Up to 6D fuel and ignition mapping
• Sequential fuel injection
• 5D boost control with multiple tables
• CAN bus support
• 512MB onboard logging memory
• QuickTune automated fuel tuning

Important Notes

• Manual transmission only
• IAT sensor recommended
• E-throttle requires modification
• Check connector matches before purchase