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

Starting with the 3-inch diameter piping, this Borla cat-back exhaust system is built to let your 2008-2014 Subaru Impreza WRX STI breathe easier. This upgrade from the stock 2.5-inch piping allows for significantly increased airflow through the turbocharged engine, which can result in a 7% to 10% horsepower gain. For those running ECU tunes or other engine modifications, this improved lung capacity is crucial for unlocking the full potential of your powerplant.

Beyond performance, Borla's engineers have also focused on practicality and aesthetics. They've managed to tuck the muffler higher than the factory unit, gaining about 1.75 inches of ground clearance. This not only helps avoid scraping on rough terrain or speed bumps but also cleans up the rear-end appearance by reducing visual clutter. The system is also lighter than stock, shedding approximately 8 pounds thanks to Borla's patented straight-through muffler design, which eliminates restrictive baffles and chambers. This weight reduction, combined with the improved airflow, contributes to a leaner, meaner machine where every bit counts.

You'll also notice a distinct improvement in sound. This system amplifies the Impreza's characteristic rumble with a rich, bassy tone that Borla is known for. Constructed from T-304 stainless steel, the exhaust is built to last, and it's finished with double-walled, rolled-edge polished T-304 stainless steel tips. Installation is designed to be a straightforward bolt-on process, and Borla backs their street systems with a Million-Mile Warranty.