Cobb Fuel System Package – 08-21 STI

Cobb Fuel System Package – 08-21 STI


Whether you want to push your stock turbo on pump gas past the stock fueling limit, start running E85, or upgrade to a larger turbo and go E85 this kit is for you. Cobb has put together some great parts to really take advantage of all of your airflow performance mods.

This is package capable of supporting 420+hp and works great with the stock turbo on E85 all they way to a 20g on E85.

In stock



Below is a list of all the included products and their features

Subaru Top Feed 1050x Fuel Injectors

  • Works with Stock Fuel Rail
  • Nominal Flow Rate – 1065cc/min @ 43.5psi
  • Matched sets with dynamic flow rate variance within 1%
  • 14mm Bottom O-Ring
  • Data supplied for tuning injectors with Accesstuner Software

Subaru Fuel Rail Line Kit STI

  • Stainless Braided PTFE Line
  • Up to 2500psi Operating Pressure
  • Double Swivel -6 AN Hose Ends
  • SAE 30R9 Certified Hose
  • Plug-and-Play with COBB Fuel Rail Kit

Subaru Fuel Pressure Regulator for Fuel Rail Kit

  • OEM Subaru Fuel Pressure Regulator
  • Plug-and-Play with COBB Fuel Rails and Lines
  • Ethanol Compatible
  • Sheathing for Abrasion Resistance

Subaru Fuel Rails

  • CNC Machined from 6061 Billet Aluminum
  • Black Anodized Finish with Laser Etched COBB Logo
  • -8 AN to -6 AN Fittings Pre-Installed
  • Compatible with Injector Dynamics Fuel Injectors
  • Allow Parallel Fuel Delivery

AEM 340 LPH Fuel Pump 

  • 340 LPH at 13.5v @ 40psi
  • 80psi relief valve
  • Compatible with E85
  • Install kit included

This package requires tuning changes.

COBB offers OTS Map support for some vehicles, check maps available for your car here: MAPS. No OTS Maps available? Find and contact your local Protuner here: PROTUNERS


This part is legal under the provisions of EPA’s Anti-Tampering Policy. COBB Tuning has established a reasonable basis (testing results) to verify that this product allows the vehicle to operate within legal emissions standards and is therefore legal to be sold for on-street use in all states that accept the legal provisions of the Clean Air Act and EPA’s Anti-Tampering Policy.NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY EMISSION CONTROLLED MOTOR VEHICLE.

Testing with the California Air Resources Board, in order to achieve 50-state compliance, is pending. Once testing is complete with California, and an EO number is issued, this product will be updated to 50-state legal status.


  • 2008-2021 STI


Installation Guide

Install Guide – Fuel Pressure Regulator Kit

Install Guide – Fuel Rails and Lines