The Subaru FlexLink flex fuel system for tuners was co-developed with HP Tuners to enable the 2007-2020 WRX STi to run full flex fuel with the factory ECU. This system has been thoroughly tested and dyno certified to provide the quickest, cleanest flex fuel solution for the Subaru 2.5L MPI engine platform.
The system includes our FlexLink data control module, industry standard content sensor with model specific quick connect fuel lines and a plug and play wiring harness.
HP Tuners provides full tuning support. Just apply HPT Custom Features in the OS tab then enable Flex Fuel by selecting the fuel sensor in the software.
Once installed and tuned the car will have full, real time adaptive flex fuel with active adjustment for gasoline, E85 or any blend of the two fuels.
NOTE: This vehicle will require an injector and fuel pump upgrade to safely run full E85. We suggest at least a 1000cc injector set and a 320lph or larger fuel pump.