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 of the processing unit is a breeze, with no alteration of the factory wiring loom required for the models listed below. Designed for the WRX V3-4 EJ20 Please check your connector 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 input & output expansion options. This ECU will need a modification before E-Throttle is usable. Suitable Applications for 227-4000 automotive computer unit: GC8D GC8E WRX and STI from 09/1996 to 08/1998 G4X PlugIn Key Features (where applicable):Up to 6D fuel and ignition mappingPrecision closed loop cam control (four cam, independent control)Sequential fuel deliveryDigital triggering, all OEM patternsOEM idle hardware supported5D boost control with three switchable tablesMotorsport features - antilag, launch, flat shiftContinuous barometric correction (on board)CAN portQuickTune - automated fuel tuningIndividual cylinder correctionUSB tuning cable includedStats recording into on-board memoryGear compensations for spark, boost and fuelReal time selectable dual fuel, ignition and boost mapsSync and crank sensors can be a combination of Hall effect, variable reluctance or opticalBoost control referenced to gear, speed or throttle position512 mega bytes data logging memory data storage unitStaged injectionKnock with "windowing"The following expansion connector inputs/outputs are provided: XS connector 1 Gnd Sensor Ground Only +5V Low Current +5V Supply DI 5 Digital Input DI 6 Digital Input Volt 5 Analog 0-5V input Volt 6 Analog 0-5V input Temp 4 Temperature sensor input Temp 3 Temperature sensor input Expansion connector 2 Gnd Sensor Ground Only +5V Low Current +5V Supply DI 9 Digital Input DI 10 Digital Input Volt 8 Analog 0-5V input Volt 9 Analog 0-5V input Ign 7 Ignition 7 Auxiliary Output Ign 8 Ignition 8 Auxiliary Output Download Manual Click here