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 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 input & output 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 for 228-4000 automotive computer unit:GC8F GC8G WRX and STI from 09/1998 to 08/00 MY99 & MY00 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 unit Staged injectionKnock with "windowing"The following expansion connector inputs/outputs are provided: XS 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 Download Manual