Hondata CANFlex Flex Fuel Kit for 16-21 Civic 1.5T

Hondata CANFlex Flex Fuel Kit for 2016–2021 Honda Civic 1.5T

Unlock the full performance potential of your 2016–2021 Honda Civic 1.5T with the Hondata CANFlex Flex Fuel Kit — the ultimate flex fuel solution engineered to deliver consistent power gains, improved torque, and enhanced throttle response. This system allows your turbocharged 1.5-liter engine to safely run on E85, pump gas, or any ethanol blend anywhere, automatically adjusting fuel and ignition maps for maximum performance and drivability. With Hondata CANFlex, you can achieve easily obtainable horsepower gains while retaining a smooth, controllable daily driving experience.

Hondata CANFlex integrates seamlessly with the factory ECU and FlashPro Manager software (v4.3.5 or later). Calibrations are designed specifically for stock 1.5T Honda Civic engines with stock intake and exhaust, ensuring reliable performance without modifications. CANFlex delivers a flatter torque curve, earlier turbo spool, and a more responsive powerband — making your Civic feel more controllable and fun to drive, whether commuting or spirited driving.

Images show FK8 CANFlex unit. Product may differ from the images shown. 

Key Features

• Compatible with 2016–2021 Honda Civic 1.5T models
• Enables use of E85, pump gas, or any ethanol blend
• 49-state legal (SEMA certified) and emissions compliant
• Delivers more power than any bolt-on (intake, exhaust, etc.)
• Improves turbo spool and throttle response
• Acts as an in-cylinder intercooler for more efficient combustion
• Includes all necessary components for installation

Performance Benefits

The CANFlex system increases horsepower and torque while keeping your Civic 1.5T clean and emissions compliant. With a flatter torque curve, your car feels smoother and more controllable, while E85 fuel acts as an in-cylinder intercooler, allowing higher boost and ignition advance safely. The system adds up to 50 HP on stock components and can be further tuned by an experienced tuner on a built engine for even more power and torque.

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What’s in the Box

• Fuel line adapter with integrated ethanol sensor
• E/B/CAN converter box (Ethanol–Bridge–CAN)
• E/B/CAN Hondata OBD2 adapter cable
• OBD II adapter
• Installation instructions

Software Requirements

Requires Hondata FlashPro Manager v4.3.5 or later for calibration loading and flex fuel monitoring.

Advantages

• More power than any bolt-on modification
• 49-state legal – passes all smog tests
• 100–105 octane fuel capability
• Lower cost per octane compared to premium gasoline
• Acts as an in-cylinder intercooler for cooler combustion

The Hondata CANFlex Flex Fuel Kit transforms your 1.5T Civic into a more flexible, powerful, and responsive machine. Retaining your stock turbo, catalytic converter, and intake, CANFlex delivers clean, emissions-compliant power gains while providing the ability to use pump gas or E85 seamlessly. All calibrations can be further tuned by experienced tuners for built engines to achieve maximum performance potential.