The COBB 08-21 Subaru STI Fuel Rails does not have enough exact application evidence to assign safe vehicle YMM. Match manufacturer part number 343150, complete vehicle, engine and transmission configuration, factory equipment, required calibration, emissions eligibility, interfaces, and every product note before ordering.

Key Features

• Direct Fit for Top-Feed Injectors: 11 mm bore accepts 14 mm O-rings on 1050x2000x 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.
• Deletes factory FPR location; pair with COBB adjustable FPR kit part 315250 for proper fuel pressure control.
• CNC-machined 6061-T6 billet aluminum with black anodized finish and laser-etched COBB logo.

Fitment

Specifications

What’s Included

One new COBB product in the exact configuration and quantity identified by manufacturer part number 343150. Calibrations, hardware, hoses, clamps, gaskets, adapters, wiring, fluids, tools, and companion components are included only when expressly stated for this exact part number.

About COBB

COBB develops engine-management, intake, cooling, exhaust, drivetrain, suspension, and vehicle-accessory products for supported performance platforms. Correct selection remains exact-vehicle, exact-configuration, exact-interface, and exact-part-number specific.

Related COBB Products

• Cobb 08-14 Subaru WRX / 08-21 STI High Flow E85 Capable Fuel Pump
• Cobb 08-21 Subaru STI (Incl. 2018 Type RA) NexGen Flex Fuel Ethanol Sensor Kit
• Cobb 08-21 Subaru STI Fuel Pressure Regulator (for Fuel Rail Kit)

Browse the COBB collection for related tuning, intake, cooling, exhaust, drivetrain, and chassis products.

Frequently Asked Questions

Why is fitment verification required for this COBB product?
Exact vehicle application evidence is not complete enough for safe YMM. Confirm the vehicle, drivetrain, factory equipment, calibration, emissions eligibility, interfaces, and exact part number before ordering.

Are all supporting parts included?
Only components expressly listed for the exact manufacturer part number are included. Tuning, hardware, hoses, clamps, gaskets, adapters, wiring, fluids, and companion components may be separate.

Is tuning or calibration required after installation?
Requirements depend on the exact product and vehicle. Intake, fuel, boost, turbo, and engine-management changes may require a compatible calibration before operation.

Installation Instructions

Follow the current COBB and factory service instructions for this exact part number. Verify fitment, factory equipment, emissions eligibility, required calibration, software and firmware, interfaces, hardware, fluid or electrical connections, and clearances before installation. Inspect the completed work and confirm safe operation before full-load use.