The Link G4+ WRXLink (3-4) WRX4+ PlugIn fits the Subaru WRX & STI V3-4. The ECU PCB fits discretely inside the original factory enclosure.

Installation of Link's Subaru WRX4+ ECU is a breeze - no alteration of the factory wiring loom is required. A built-in connector (or pins in some models) provides additional inputs and outputs such as oil pressure inputs or anti-lag / logging switches.

Factory features are supported - see Features for any exceptions.

MAP Sensor not included.
 
Features
G4+ 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
Up to 32Mbit internal logging memory
Staged injection
Knock with "windowing"