COBB CAN Flex Fuel Upgrade Subaru WRX 2022-2025

Part Details:

Unlock the full potential of your WRX with COBB’s latest CAN-based Flex Fuel upgrade. This system allows your 2022–2025 Subaru WRX to automatically adjust engine performance based on the ethanol content in your fuel, delivering smooth power gains and optimized drivability—whether you’re running 91 octane, E85, or anything in between.

Designed as a modern, simplified solution, this kit integrates directly with the WRX’s factory CAN network. No guesswork, no complicated wiring. Once installed, the ECU receives real-time ethanol concentration and fuel temperature data, allowing your tuner to create calibrations that adapt instantly to changing fuel blends.

Key Features

• CAN-based integration for clean, accurate communication with the vehicle’s ECU.

• Real-time ethanol content monitoring, enabling seamless transitions between pump fuel and ethanol blends.

• Ethanol sensor + module included for a complete plug-and-play installation.

• Improved tuning flexibility, supporting both daily driving reliability and high-performance setups.

• Compatible with 2022–2025 Subaru WRX (FA24 engine).

• Built to OEM-level quality, ensuring long-term durability and consistent sensor accuracy.

Why Choose This Flex Fuel Kit?

If you plan to run E85 or mixed ethanol fuels, proper monitoring is critical. The COBB CAN Flex Fuel Upgrade gives tuners the precise data they need to safely increase power and maximize efficiency—without sacrificing drivability. It’s the ideal foundation for WRX owners moving toward a flex-fuel or high-performance build.

Recommended Supporting Fuel Components

• Fuel Injectors – higher ethanol content often requires increased fuel flow to maintain proper air-fuel ratios.
• Fuel Pumps – support the additional fuel volume needed for ethanol and higher power levels.
• Fuel Pressure Regulators – help maintain consistent fuel pressure across varying ethanol blends.
• Fuel Delivery Components – explore supporting fuel system parts designed to work together.

Learn more about COBB Tuning performance solutions and supporting components