Cobb Tuning

COBB Fuel Rail Line Kit to Flex Fuel | 2008-2020 Subaru STI (315260)

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Phone 1-888-627-3736

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2008-2020 Subaru STI Fuel Rail Line Kit to Flex Fuel by COBB Tuning

The COBB Subaru Fuel Rail Line Kit for Flex Fuel is designed to adapt your existing the COBB Fuel Rail Line Kit to work with the COBB Flex Fuel Kit. All lines are pre-assembled with double-swivel sport crimp style hose ends and ready for installation. Stainless reinforced PTFE line with black covering has a 3" minimum bend radius which allows for a straight forward installation when used as intended. With a 2500psi operating pressure and >10000psi burst pressure, these lines are incredibly robust. You will need this kit to adapt the standard COBB Fuel Rails and Fuel Line Kits with the COBB Flex Fuel Ethanol Sensor Kit.


  • Stainless Braided PTFE Line
  • Up to 2500psi Operating Pressure
  • Double Swivel -6 AN Hose Ends
  • SAE 30R9 Certified Hose
  • Allows Integration of Flex Fuel Kit with COBB Fuel Lines/Rails

California Residents: Prop 65 Warning


  • 2015 - 2020 Subaru WRX STI
  • 2008 - 2014 Subaru Impreza WRX STi

What's In The Box?

  • 1 - Fuel Rail Line Kit to Flex Fuel
  • Necessary Hardware/Fittings
  • Warranty Information



  • COBB Manufacturer's Warranty

Customer Reviews

Based on 1 review
Great fit

You will need this kit if you run Cobb fuel rails and lines. Pricy but very quality made (as always by Cobb) and good fitment! Pretty hassle free installation.