Cobb 08-21 Subaru STI Fuel Rails-COBB-COBB343150
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Cobb 08-21 Subaru STI Fuel Rails

COBB
COBB343150
700424676194
Fuel Rails
20+ Units In Stock - Ships Next Business Day
$ 300.00
$ 300.00

SKU: B343150   |   UPC: 700424676194

COBB Top-Feed Fuel Rails – 2008-2021 Subaru WRX STI (incl. Type RA)

The COBB 343150 Top-Feed Fuel Rails stand as the #1 selling fuel rail upgrade for 2008–2021 Subaru WRX STI models. CNC-machined from billet 6061-T6 aluminum with black anodized finish and three -8 AN ORB ports, these rails handle 1500+ HP while directly supporting top-feed injectors from 1050x to 2000x. Complete kit includes fittings, brackets, and braided crossover line for straightforward installation on E85, flex fuel, big turbo, or any high-power EJ257 engine.

Key Features

  • -8 AN ORB Ports: Provide massive fuel flow capacity for 1500+ HP applications with three oversized ports for unrestricted delivery.
  • Direct Fit for Top-Feed Injectors: 11 mm bore accepts 14 mm O-rings on 1050x–2000x injectors for seamless high-flow operation.
  • CNC Billet Aluminum: 6061-T6 construction with black anodized finish and laser-etched COBB logo ensures durability and precise fit.
  • Plug-and-Play Installation: Bolts in with supplied brackets, fittings, and braided stainless crossover line for clean, reliable setup.
  • Made in the USA: Lifetime warranty against defects backs American-made quality for every serious STI build.

Product Notes

  • Fits all 2008–2021 WRX STI including 2018 Type RA and 2021 Final Edition; requires top-feed injectors like COBB 312xxx series.
  • Deletes factory FPR location; pair with COBB adjustable FPR kit part 315250 for proper fuel pressure control.
  • In stock and ships same or next business day in official COBB retail packaging.

Installation Notes

  • Professional installation recommended.
  • 60–90 minute job requires fuel rail removal; full color instructions included.
  • Compatible with COBB FPR kit 315250 and 1050x+ top-feed injectors; no chassis modifications needed.

This Part Fits

Year Make Model Submodel
2008-2014 Subaru Impreza WRX STI Hatchback, Sedan
2015-2021 Subaru WRX STI Hatchback, Type RA, Final Edition

Why Choose COBB Tuning?

  • #1 name in Subaru performance for over 20 years
  • Engineered and manufactured in the USA
  • Proven on every 800–1500+ HP EJ257 build worldwide

Frequently Asked Questions

  • Q: Will this fit my 2018 Type RA?
    A: Yes, fits every 2008–2021 STI including Type RA and Final Edition without modification.
  • Q: What material and finish are used?
    A: CNC-machined 6061-T6 billet aluminum with black anodized finish and laser-etched COBB logo.
  • Q: What is the warranty and install time?
    A: Lifetime against defects; 60–90 minute install with full instructions and all hardware included.

Shipping & Handling

  • Method: UPS/FedEx Ground 
  • Availability: In stock – ships same or next business day
  • Packaging: Official COBB retail box, 12" x 8" x 6"
  • Weight: 2.4 lbs

Request For Information

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