Fitment: This kit is designed for 2008 - 2021 Subaru STI. It's specifically made to work with the latest Cobb “Green Speed” tuning packages. Compatibility may vary among tuners, so consult your tuner. If you want to replace old flex fuel kits without retuning, check out iBR's FLX01 Kit or FLX01 Upgrade Kit. Features: The IBR FLX02 Flex Fuel Upgrade Kit allows you to log and monitor ethanol content and is compatible with Cobb's latest tuning software. Its proprietary controller creates its own 12V supply for the sensor, reducing wiring, installation time, and improving reliability. It references ECU 5V power for consistent and accurate data. The kit comes with a detachable custom wiring harness for easy troubleshooting. Other features include a replaceable wiring harness (sold separately), automotive - grade wiring, no need for 12V from the boost control solenoid circuit, top - down installation, accurate analog output from ECU 5V, a durable potted housing with a solid pin connector, and tuning is required. Included: FLX02 Flex Fuel Sensor Controller and Wiring Harness. This kit is compatible with iBR's standard FPS01 Fuel Pressure Sensor kit (sold separately), which is great for high - flow E85 mixtures. WARNING: (http://www.p65warnings.ca.gov)

Using the IBR FLX02 Flex Fuel Upgrade Kit: First, make sure your car is a 2008 - 2021 Subaru STI. Then, work with your tuner to ensure compatibility with the Cobb “Green Speed” tuning package. The installation can be done from the top of the car, so you don't have to crawl under it. Connect the wiring harness and the FLX02 Flex Fuel Sensor Controller. The kit has its own 12V supply for the sensor, so you don't need to use the boost control solenoid circuit. Once installed, the system will log and monitor the ethanol content in your fuel. Note: Compatibility may vary among tuners, so always consult your tuner. Tuning is required for the kit to work properly. Maintenance: If you need to troubleshoot or repair, the custom wiring harness can be detached from the controller easily. The wiring harness is replaceable and sold separately. Keep an eye on the system to ensure it's providing accurate data. If you're using high - flow E85 mixtures, consider getting the iBR's standard FPS01 Fuel Pressure Sensor kit for better performance.