Cobb Stage 1+ CAN Flex Fuel Power Package – SF Intake – 2018-2021 Subaru WRX

Cobb Stage 1+ CAN Flex Fuel Power Package — SF Intake — 2018-2021 Subaru WRX

The Cobb Stage 1+ CAN Flex Fuel Power Package with SF Intake for the 2018-2021 Subaru WRX bundles the Accessport V3, the Cobb SF Intake System, and the Cobb CAN Flex Fuel Kit — the complete Stage 1+ foundation with dynamic ethanol calibration capability. The SF Intake improves airflow over the factory airbox, and the CAN Flex Fuel sensor enables the Accessport to automatically adjust calibration for any ethanol blend.

DETAILS

• Includes: Accessport V3 + SF Intake + CAN Flex Fuel Kit
• Platform: 2018-2021 Subaru WRX FA20DIT
• SF Intake: replaces factory airbox — improved airflow for Stage 1+ boost
• CAN Flex Fuel: real-time ethanol measurement, automatic calibration adjustment
• Works E10 through E85 — no manual map switching
• Stage 1+ CAN FF OTS maps: 93 octane, E30, E40, E85
• NOTE: Ships via UPS/FedEx — signature required at delivery

How CAN Flex Fuel Works

Cobb’s CAN Flex Fuel system uses an ethanol content sensor in the fuel line to measure the actual ethanol percentage in real time and communicate it to the Accessport via CAN bus. The Accessport ECU map adjusts fueling, ignition timing, and boost targets automatically based on the measured content — no manual map switching required. Run any blend from 93 octane through E85, and the system calibrates itself for whatever is in the tank.

Ethanol Benefits and System Installation

Ethanol provides two performance advantages: a significantly higher effective octane rating that allows more aggressive ignition timing, and a high latent heat of vaporization that cools the intake charge. Together these allow the CAN Flex Fuel OTS maps to target higher boost and more aggressive timing on E30 or higher blends versus the equivalent 93-octane gasoline maps, producing a meaningful power increase when ethanol fuel is available.

What’s in the Box

• Cobb Accessport V3
• Cobb SF Intake System
• CAN Flex Fuel sensor kit
• Fuel fittings
• OBD-II cable
• USB cable
• 2 faceplates
• Universal mount

Why Choose Cobb Tuning

Cobb Tuning has been developing performance software and hardware for turbocharged enthusiast vehicles since 1999. Founded in Austin, Texas, Cobb built its reputation on the Accessport and expanded into a full catalog of hardware engineered to complement it. Every OTS map is developed in-house on real vehicles, and every hardware product is validated as part of a complete system — not sourced and sold in isolation. That integrated approach is why Cobb produces consistent, reliable results across the builds we see every day.

The RallySport Take

Stage 1+ CAN Flex Fuel for the 2018-2021 WRX gives owners a complete calibration and intake foundation with ethanol capability built in from the start. On E30 the CAN Flex Fuel OTS maps target noticeably higher boost and more aggressive timing than the 93-octane Stage 1+ maps, making the FA20DIT feel meaningfully more capable when ethanol fuel is available — while automatically falling back to 93-octane calibration targets when running pump gasoline.

Fitment

Year	Make	Model	Notes
2018-2021	Subaru	WRX	FA20DIT MT/CVT