This 3" diameter into dual 2.25" BORLA Cat-Back* system is tuned for performance and sound for both the 2.0L engine in the WRX and the 2.5L engine in the STI. Our S-Type sound level is designed to bring out the Subaru Boxer engine rumble and provides an aggressive sound without the drone. This system features quad (2 per muffler) 3.5" round high temperature black coated T-304 stainless steel tips, but is also available with polished T-304 stainless steel tips. For ease of installation, this Cat-Back is a direct bolt on part and does not require cutting. BORLA Cat-Back* & Axle-Back 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. Like all BORLA exhaust products, each system is handmade in the USA by master craftspeople and features premium, high-quality T-304 austenitic stainless steel construction, precision computer numerical control (CNC) manufacturing, ultra-smooth mandrel bent piping, and a Million-Mile Warranty.
S-Type Cat-Back* Exhaust System 2015-2021 Subaru Impreza WRX/ WRX STI Sedan 2.0L/ 2.5L Turbo 4 Cyl. All Wheel Drive Automatic/ Manual Transmission 4 Door.
2015-2021 Subaru Impreza WRX/ WRX STI Sedan 2.0L/ 2.5L Turbo 4 Cyl. All Wheel Drive Automatic/ Manual Transmission 4 Door.

Fitment:
2015 Subaru WRX Base
2015 Subaru WRX Limited
2015 Subaru WRX Premium
2015 Subaru WRX STI Base
2015 Subaru WRX STI Launch Edition
2015 Subaru WRX STI Limited
2016 Subaru WRX Base
2016 Subaru WRX Limited
2016 Subaru WRX Premium
2016 Subaru WRX STI Base
2016 Subaru WRX STI Limited
2016 Subaru WRX STI Series.HyperBlue
2017 Subaru WRX Base
2017 Subaru WRX Limited
2017 Subaru WRX Premium
2017 Subaru WRX STI Base
2017 Subaru WRX STI Limited
2018 Subaru WRX Base
2018 Subaru WRX Limited
2018 Subaru WRX Premium
2018 Subaru WRX STI Base
2018 Subaru WRX STI Limited
2018 Subaru WRX STI Type RA
2019 Subaru WRX Base
2019 Subaru WRX Limited
2019 Subaru WRX Premium
2019 Subaru WRX STI Base
2019 Subaru WRX STI Limited
2019 Subaru WRX STI S209
2020 Subaru WRX Base
2020 Subaru WRX Limited
2020 Subaru WRX Premium
2020 Subaru WRX STI Base
2020 Subaru WRX STI Limited
2021 Subaru WRX Base
2021 Subaru WRX Limited
2021 Subaru WRX Premium
2021 Subaru WRX STI Base
2021 Subaru WRX STI Limited