We are proud to offer a Motorsports friendly plug and play harness for ALL USDM 2004 to 2021 STi, WRX, LGT and FXT to the Haltech Elite 2500 ecu using the EJ25 engine. This is a direct plug n play harness connecting your original engine wiring harness to the Haltech Elite 2500 ECU. This harness and the Haltech ECU are both designed for off road motorsports use such as time attack, rally and circuit racing. Manual or sequential transmissions only. We have designed this package specifically with Full Flex Fuel support for ALL STI and WRX’s using the EJ25 including the 2008-2015 cars with CANbus as well as the 2015 to 2021 STI with updated CANbus and push button start.
Our STI to Haltech Elite ECU packages deliver full motorsports functionality including:
- Launch control
- Anti lag
- No lift shift
- Flex fuel sensor support (with IO expansion module)
- Engine protection strategies
- Live map select aka map switching functions
- Closed loop boost control, fueling, knock feedback
- Open software (FREE to the public tuning and data logging software)
- Optional E-tune support + Track support for the serious racers/drivers
- Fully bench tested to ensure 100% accuracy of all wiring. (These harnesses are build specifically to our spec in order to fully support all motorsports functions such as flex fuel via the optional IO expansion module.)
Special offer: For all Haltech plug & play ECU package customer (ECU + harness) we offer turn key base maps for all Injector Dynamic injectors free of charge with any ID injector order.
Plug & Play Harness, 2004-2021 STI & WRX to Haltech Elite 2500
This is the perfect wiring solution for any track prepped race car USDM 2004-2021 sti & wrx using an EJ25 that wants to take full advantage of the unlimited tunability of the Elite 2500 ECU package. This is hands down the most popular Suabru ECU package for anyone planning to run Flex Fuel with full support for the Cobb Flex fuel kits as well as the VE flex fuel kit. (We support analog flex fuel as well as digital flex fuel inputs with our Elite 2500 sti ECU packages.)
If you don’t already have the following electronics/parts in your car these are the most popular and performance orientated accessories/sensors for the Sti, WRX to Haltech Elite 2500 ecu :
- The AEM X series Wideband or the Haltech wideband o2 controller and sensor for closed loop fueling functions.
- Optional flex fuel, fuel pressure and oil pressure inputs are all standard inputs on the Elite 2500 ecu and highly recommended. These sensors support engine protection features key to any reliable race car.
- VE wideband knock kit (single sensor kit for EJ25 engines) This is a flat response Bosch motorsport knock sensor complete with shielded coax wire harness. These are the most effective knock kits available and offer better knock feedback than even the OEM Subaru knock sensor.
- ID1050x STI and WRX Injector dynamics 1050cc Injectors, 350-450whp
- ID1300x injectors STI perfect for power levels between 450-650whp
- ID1700x injectors STI provide good idle with ability to support 550-850whp
- ID2600xds injectors STI Over 2600cc of flow these are the best injectors for any high power alcohol fueled EJ engine 750-1300whp
**This is a Motorsports only item, never to be used on public roads within the USA. Please respect our environment and consider running renewable fuels like ethanol in your race car.**