2011-2014 Subaru WRX and STI HB Borla Cat-Back S-Type Exhaust

Borla Cat-Back Exhaust

BORLA® Performance announces the release of a new quad-exit Cat-Back™ exhaust for the venerable 2008 – ‘09 Subaru WRX STi. This race-inspired system (PN140312) checks all the boxes on every Subaru enthusiasts’ hit list, taking this flagship to an eve higher realm of performance. For starters, BORLA® engineers upgraded the STi’s exhaust plumbing from 2.5 to 3” in diameter. The resulting increased airflow through the turbocharged powerplant provides horsepower gains of 7% - 10%. Hardcore enthusiasts who add Stage 1 or 2 chip upgrades will find this boost to the STi’s lung capacity vital to unlocking the ECU’s full potential. Drivers negotiating terrain from rally course jumps to shopping mall speedbumps will appreciate how BORLA’s RD fabricators found room to tuck the system muffler higher than the OE exhaust, providing a 1.75” clearance gain. This additional room also enhances rear-section aerodynamics and improves appearance by reducing clutter. Besides being higher, it’s lighter. Thanks to BORLA’s patented straight-through design that eliminates power-robbing baffles and chambers, the STi sheds approximately 8 lbs, making it a bit leaner meaner in a class where every bit counts. True to form, the exhaust amplifies and enhances the STi’s distinctive rumbling gurgle with the rich bass of BORLA’s trademark sound of power. Combined with high-quality austenitic stainless steel construction and double-walled rolled-edge polished tips, drivers get the sound and looks they expect from the world’s most winning exhaust. BORLA®, the original pioneers of high-quality stainless steel free-flow exhaust, utilizes patented award and race winning technology to deliver quality, sound, and performance gains. All with an easy bolt-on installation, and backed by a solid Million-Mile Warranty on all street systems.

Borla Cat-back TM & Rear Section exhaust systems feature patented straight-through and multi-core technology to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA® Sound of Power respected by motoring enthusiasts everywhere.

Each system is built from premium 300-series austenitic stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer-controlled CNC manufacturing ensures an accurate fit. Best of all, BORLA stands behind every system with a Million-Mile Warranty. Just what you’d expect from the world’s most experienced (and most winning) exhaust brand.

Product Type
Cat-Back™ Exhaust

Pipe Diameter
Single 3" into Dual 2.25"

Tip Size
3.5"

Tip Description
Dual Round Rolled Angle-Cut Long

Tip #
18

Exit
Dual Split Rear Exit

Fits
2008-2014 Subaru Impreza WRX STI [and] 2011-2014 Subaru Impreza WRX Hatchback 2.5L Turbo 4cyl AWD Manual Trans 4-Door