Description
BORLA® Performance offers a quad-exit Cat-Back™ exhaust for the venerable 2008–2014 Subaru WRX STI. This race-inspired system (PN140312) checks all the boxes on every Subaru enthusiasts’ hit list, taking this flagship to an even 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.
