Subaru WRX & STI V5-6 Link G4X Plug In ECU
Subaru WRX & STI V5-6 Link G4X Plug In ECU

Subaru WRX & STI V5-6 Link G4X Plug In ECU

$1,347.00 Sale

This is the latest Link G4X+ Subaru WRX & STI V5-6 (99 - 00) Plug-in ECU.

Designed for the WRX V5-6 EJ20. 

  • 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 Forester

G4X PlugIn Key Features (where applicable):

  • Up to 6D fuel and ignition mapping
  • Precision closed loop cam control (four cam, independent control)
  • Sequential fuel delivery
  • Digital triggering, all OEM patterns
  • OEM idle hardware supported
  • 5D boost control with three switchable tables
  • Motorsport features - antilag, launch, flat shift
  • Continuous barometric correction (on board)
  • CAN port
  • QuickTune - automated fuel tuning
  • Individual cylinder correction
  • USB tuning cable included
  • Stats recording into on-board memory
  • Gear compensations for spark, boost and fuel
  • Real time selectable dual fuel, ignition and boost maps
  • Sync and crank sensors can be a combination of Hall effect, variable reluctance or optical
  • Boost control referenced to gear, speed or throttle position
  • 512 mega bytes data logging memory
  • Staged injection
  • Knock with "windowing"


The following expansion connector inputs/outputs are provided: 
Expansion connector 1 

  • Gnd                Sensor Ground Only  
  • +5V Out          Low Current +5V Supply 
  • DI 8               Digital Input 
  • DI 9               Digital Input 
  • An Volt 8        Analog 0-5V input 
  • An Volt 9        Analog 0-5V input 
  • Ign 7                Ignition 7 Auxiliary Output 
  • Ign 8                Ignition 8 Auxiliary Output 


Expansion connector 2  

  • Gnd                Sensor Ground Only  
  • +5V Out        Low Current +5V Supply 
  • DI 5                Digital Input 
  • DI 7                Digital Input 
  • An Volt 5        Analog 0-5V input 
  • An Volt 6        Analog 0-5V input 
  • An Temp 2        Temperature sensor input 
  • An Temp 3        Temperature sensor input
Link G4X ECUs do not require the use of an air flow meter. The engine can be converted to speed density using a MAP sensor and an intake air temperature (IAT) sensor (IAT sensors sold separately)

If you are wanting more boost than the OEM 2 bar map sensor, We can provide a 3 or 4 Bar sensor at extra cost.

The G4X Subaru WRX & STI V5-6 plug-in ECU comes with a non-engine-specific base map. The ECU will need to be configured for the engine type and then tuned by a professional. The ECU comes with free PCLink software.

We can also provide the following with your new Link ECU at an added cost:
- Fuel System Upgrades
- Turbosmart Wastegates, Blow off valves and Fuel Pressure Regulators
- Boost Control Solenoids
- Dyno Tuning
- Engine sensors and plugs etc
- Full Link ECU engine wiring installation available at an extra cost

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