COBB Stage 1 CAN Flex Fuel Power Package (SUB0041W1-2FF) | Subaru WRX 2018-2021

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.