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
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