Borla 08-14 Subaru STi / 11-14 WRX Catback Exhaust

This Borla cat-back exhaust system is built for the verified 2008-2014 Subaru Impreza WRX STI application listed below. Select it by exact manufacturer part number 140312 and confirm the full engine, drivetrain, body, wheelbase, factory-exhaust, and Borla application notes before ordering.

Key Features

• Larger Diameter Tubing: 3-inch inlet/outlet increases airflow through the turbo for 7-10% power gains, essential for Stage 1/2 tunes.
• Weight Reduction: 8 lbs lighter than OE thanks to straight-through design without baffles, improving handling in rally or street driving.
• Increased Clearance: Muffler tucked 1.75 inches higher than stock for better ground clearance, aerodynamics, and cleaner rear appearance.
• T-304 Stainless Steel Construction: All-welded for durability, with polished double-walled 3.5-inch quad tips in split rear exit position.
• Borla Sound of Power: Amplifies STI’s rumble with rich bass tones from patented straight-through S-Type muffler technology.
• Bolt-on installation with no cutting or welding required.

Fitment

Specifications

What’s Included

One new Borla product identified by manufacturer part number 140312. Clamps, hangers, gaskets, tips, pipes, tools, and companion parts are included only when expressly listed for this exact part number.

About Borla

Borla develops stainless-steel exhaust systems, mufflers, tips, pipes, and related components for vehicle-specific and universal performance applications. Product selection remains exact-application and exact-part-number specific.

Related Borla Products

• Borla 11-14 Subaru Impreza WRX/STI Sedan 4dr ATAK SS Catback Exhaust
• Borla 15-19 Subaru WRX/STI 2.5L Turbo 3in S-Type Catback Exhaust – 2.5in Black Chrome Tips
• Borla 08-10 Subaru Impreza 2.5i Sedan 4DR SS Catback Exhaust

Browse the Borla collection for related exhaust systems and components.

Frequently Asked Questions

Will this Borla part fit my 2008-2014 Subaru Impreza WRX STI?
That application is listed, but confirm the engine, drivetrain, body or cab style, wheelbase, factory exhaust layout, tip opening, and every Borla application note before ordering.

Will this change require an engine tune?
A cat-back, axle-back, tip, muffler, or post-catalyst component usually does not require tuning, but confirm the exact application, emissions configuration, oxygen-sensor locations, and local requirements before installation.

What should I inspect before installation?
Check the shipping carton and components against the exact part number, then inspect clamps, hangers, gaskets, mating flanges, clearances, tip alignment, and required reused factory hardware before removing the original exhaust.

Installation Instructions

Follow the current Borla instructions and vehicle service information for this exact part number. Let the exhaust cool, support the vehicle safely, compare all parts before removal, protect sensors and wiring, use the specified clamps and torque values, align all joints and tips without preload, confirm body and suspension clearance, check for leaks, and retorque after the first heat cycles. Professional installation is recommended.