COBB 3F2650 CAN Flex Fuel Upgrade Kit | 2017-2020 Ford F-150 EcoBoost Raptor

Overview

The COBB CAN Flex Fuel Upgrade Kit (Part #3F2650) is the definitive flex fuel solution for Gen2 (2017–2020) Ford F-150 EcoBoost Raptor owners seeking to unlock the full power potential of ethanol-blended fuels. Designed by COBB Tuning — the most trusted name in Ford performance — this kit seamlessly integrates real-time ethanol content sensing with your Raptor's factory ECU via the CAN bus, enabling dynamic, Accessport-delivered flex fuel calibrations on any pump blend from E10 to E50 (and beyond with upgraded injectors). If you're looking for the best flex fuel kit for a 2017–2020 Ford F-150 Raptor, this is the plug-and-play upgrade engineered specifically for your truck.

Key Features & Benefits

• Real-Time Ethanol Content Sensing — The ethanol sensor continuously measures fuel blend percentage and feeds live data directly to the ECU, enabling the Accessport calibration to dynamically adjust fueling, timing, and boost targets for any ethanol level — no manual retunes required.
• CAN Gateway Module — COBB's proprietary CAN Gateway injects aftermarket sensor data directly into the truck's CAN network, where it is absorbed by the ECU and used in either a COBB Off-The-Shelf (OTS) map or a custom calibration from a COBB Protuner.
• Billet Aluminum CAN Gateway Housing — The Gateway is constructed of billet aluminum encasing a precision-manufactured PCB, delivering durability and a professional, rugged appearance consistent with high-end aftermarket equipment.
• True Plug-and-Play Installation — Includes a vehicle-specific wiring harness that routes into the cabin via a CAN adapter. No drilling required — the bolt-in bracket and quick-connect fuel fittings make this a straightforward DIY install.
• Massive Power Gains on Ethanol — COBB's own development Raptor with a Stage 2 setup baselines 447 WHP / 565 WTQ on 93 octane (E10). Simply switching fuel — no other hardware changes — jumps output to 514 WHP / 595 WTQ on E50, demonstrating the raw potential of this kit.
• Compatible with OTS & Custom Tuning — Works seamlessly with COBB Accessport V3 OTS maps (available for immediate download) and is fully supported in Ford Accesstuner Pro HL for custom calibration by a COBB Protuner.
• Ethanol: Affordable High-Octane Performance — Ethanol delivers an effective octane rating of ~100–105 depending on blend percentage. Its superior heat absorption properties result in cooler combustion temperatures, improved knock resistance, and more aggressive ignition timing — all of which translate to real power on the dyno.
• Stackable with Existing COBB Upgrades — Can be added to existing Stage 1, Stage 1+, and Stage 2+ Power Packages, or purchased as a standalone kit to complement your current COBB setup.
• EPA Compliant (49-State) — COBB Tuning has established Emissions Certification verifying this product allows the vehicle to operate within legal emissions standards and is legal to be sold for on-street use in all states that accept the Clean Air Act and EPA's Anti-Tampering Policy provisions.

What's Included

• COBB CAN Gateway Module (billet aluminum, precision PCB)
• CAN Gateway Mounting Bracket
• Vehicle-Specific CAN Wiring Harness (Raptor 2017–2020)
• CAN Ethanol Content Sensor
• Ethanol Sensor Mounting Bracket
• Pre-Made Fuel Lines with Quick-Connect Fittings
• Sensor-to-Gateway Wiring Harness

Specifications

Manufacturer Part Number	3F2650
UPC	731946519690
Brand	COBB Tuning
Weight	4.00 lbs
Gateway Housing Material	Billet Aluminum
Supported Ethanol Range (Stock Injectors)	E10 – E50
Supported Ethanol Range (Upgraded Injectors)	E10 – E85
Effective Fuel Octane (E85)	~100–105 RON equivalent
Dyno Result (Stage 2, E10 / 93 octane)	447 WHP / 565 WTQ
Dyno Result (Stage 2, E50)	514 WHP / 595 WTQ
Tuning Platform Required	COBB Accessport V3 (sold separately)
Emissions Compliance	EPA Anti-Tampering Policy Compliant (49-State); NOT CARB Legal
California Legal	No — Not for sale or use in California on emission-controlled vehicles

Fitment & Compatibility

This kit is designed exclusively for the 2017, 2018, 2019, and 2020 Ford F-150 Raptor (USDM) with the 3.5L V6 EcoBoost engine. It is also compatible with the 2019–2020 Ford F-150 Limited. Important Note for SuperCab Trucks: This kit is not directly compatible with SuperCab configurations — contact COBB Customer Support for an appropriate length fuel line. A COBB Accessport V3 (sold separately) is required to take advantage of the Flex Fuel calibrations.

Frequently Asked Questions

Q: Do I need to drain my fuel tank before switching to an ethanol blend?
A: No. COBB Flex Fuel maps dynamically adjust to the ethanol percentage in your tank in real time — simply fill up with your preferred ethanol blend and the system adapts automatically.

Q: Can I still run standard 91 or 93 octane pump gas?
A: Absolutely. The Accessport OTS calibration adjusts to whatever ethanol content is detected, including low-ethanol E10 pump gas. That's the whole point of a flex fuel system.

Q: Do I need upgraded fuel injectors?
A: For ethanol content at E50 or lower, factory injectors are sufficient. For ethanol content above E50 (including full E85), upgraded injectors are required to keep the fuel system within safe flow limits.

Q: Is this kit CARB compliant?
A: No. This product is NOT legal for sale or use in California on any emission-controlled motor vehicle. CARB testing is pending; the product will be updated to 50-state legal status once an EO number is issued.

Q: Is a COBB Accessport required?
A: Yes. The Accessport V3 (sold separately) is required to load and utilize the Flex Fuel OTS calibrations that the CAN Gateway data feeds into.

Installation

The COBB CAN Flex Fuel Kit features true plug-and-play installation with no drilling required. The ethanol sensor mounts inline on the fuel line using quick-connect fittings, and the CAN Gateway bolts in using the included bracket. The vehicle-specific harness routes into the cabin and plugs into the CAN bus via the included CAN adapter. Note: Installation of the CAN harness component requires temporary removal of the Radio/Cockpit Control Unit. While this is a DIY-friendly installation, those unfamiliar with automotive electrical work should consult a qualified technician or a COBB Protuner for installation and calibration support.