COBB Stage 1 CAN Flex Fuel Power Package (SUB0041W1-2FF) | Subaru WRX 2018-2021
Description
Description
The COBB Stage 1 CAN Flex Fuel Power Package (SUB0041W1-2FF) delivers an accessible, ethanol-ready performance upgrade for 2018–2021 Subaru WRX models by enabling COBB’s CAN-integrated Flex Fuel system. This package allows the FA20DIT engine to take advantage of E85 and blended ethanol fuels while improving drivability, responsiveness, and tuning flexibility within a Stage 1 configuration.
KEY FEATURES
- Complete Stage 1 CAN Flex Fuel system for 2018–2021 Subaru WRX
- Enables E85 and ethanol-blend fuel usage through COBB’s CAN-based Flex Fuel logic
- Improves combustion stability and expands tuning adaptability
- Enhances throttle response and smooths torque delivery
- Compatible with COBB CAN Flex Fuel Stage 1 OTS calibrations and custom tuning
- Provides a reliable foundation for future performance upgrades
- Engineered for OEM-like installation and seamless integration
TECHNICAL SPECIFICATIONS
- Platform Compatibility: Subaru WRX 2018–2021
- Package Level: Stage 1 with CAN-based Flex Fuel capability
- Fuel Support: Pump gas, E85, and blended ethanol mixtures
- Tuning Requirement: COBB Stage 1 CAN Flex Fuel OTS map or a custom CAN-based NexGen calibration
- Primary Benefits: Increased knock resistance, broader tuning range, and improved drivability
- Included Components: Essential hardware to activate CAN Flex Fuel functionality
- Application: Ideal entry-level upgrade for ethanol-enabled performance builds
VEHICLE FITMENT
- Subaru WRX 2018–2021
COBB delivers proven, data-driven performance solutions engineered to optimize your Subaru with unmatched precision and reliability.








