Cobb 08-21 Subaru STI (Incl. 2018 Type RA) NexGen Flex Fuel Ethanol Sensor Kit

Upgrade your fuel system with the COBB Tuning NexGen Flex Fuel Ethanol Sensor Kit, designed specifically for the 2008–2021 Subaru STI, including the 2018 Type RA. This kit provides accurate real-time ethanol content measurement, allowing your engine calibration to safely optimize performance when running ethanol-blended fuels. The NexGen Flex Fuel system utilizes a high-quality ethanol content sensor and vehicle-specific wiring harness for a clean, plug-and-play installation with no cutting or splicing required. By continuously monitoring ethanol content, your tuner can create a calibration that takes full advantage of varying ethanol blends while maintaining reliability and drivability. Whether you're running pump gas, E30, E60, or full E85 (when supported by your fuel system and tune), the COBB NexGen Flex Fuel Kit provides the data needed for precise fuel and ignition adjustments.