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Injen 15-20 Subaru STI Cat Back Exhaust w/ Quad Titanium Tips

Take your Subaru STI to the next level with the Injen Performance Cat-Back Exhaust System. Our custom dual muffler design produces a crisp, clean, and deep rumble at idle and an aggressive roar when you're pushing the limits.

Manufactured from 304 Stainless Steel, this system is built to last with the highest level of tensile strength and rust resistance. The premium polished finish on the mufflers and burnt titanium look exhaust tips offer superb aesthetics that perfectly complement the sound of the system itself.

  • Stepped piping design for consistent flow rate and increased performance
  • V-Band clamps and flanges for simple and quick installation
  • No cutting, drilling, or modification required for installation
  • Uses all factory mounting points for convenient placement and compatibility

Upgrade your ride with the Injen Performance Cat-Back Exhaust System, backed by the world-renowned Injen Limited Lifetime Warranty.

Make Model Year Type
Subaru WRX 2015 Base
Subaru WRX 2015 Limited
Subaru WRX 2015 Premium
Subaru WRX 2016 Base
Subaru WRX 2016 Limited
Subaru WRX 2016 Premium
Subaru WRX 2017 Base
Subaru WRX 2017 Limited
Subaru WRX 2017 Premium
Subaru WRX 2018 Base
Subaru WRX 2018 Limited
Subaru WRX 2018 Premium
Subaru WRX 2019 Base
Subaru WRX 2019 Limited
Subaru WRX 2019 Premium
Subaru WRX 2020 Base
Subaru WRX 2020 Limited
Subaru WRX 2020 Premium
Subaru WRX 2021 Base
Subaru WRX 2021 Limited
Subaru WRX 2021 Premium
Subaru WRX STI 2015 Base
Subaru WRX STI 2015 Launch Edition
Subaru WRX STI 2015 Limited
Subaru WRX STI 2016 Base
Subaru WRX STI 2016 Limited
Subaru WRX STI 2016 Series.HyperBlue
Subaru WRX STI 2017 Base
Subaru WRX STI 2017 Limited
Subaru WRX STI 2018 Base
Subaru WRX STI 2018 Limited
Subaru WRX STI 2018 Type RA
Subaru WRX STI 2019 Base
Subaru WRX STI 2019 Limited
Subaru WRX STI 2019 S209
Subaru WRX STI 2020 Base
Subaru WRX STI 2020 Limited
Subaru WRX STI 2021 Base
Subaru WRX STI 2021 Limited
In 1988, a young entrepreneur named Ron Delgado was working late into the evening – trying to find a better way to polish products for his family “job shop” business. At the time, most machines only polished along flat surfaces. But when Ron had the idea for a multi-axis machine – which could polish better and faster than anything he had used before - he was determined to make it a reality. What began as a mission to perfect the art of polishing soon grew into a full-fledged quest to develop industry-changing design and manufacturing solutions. And, in 1991 – as the demand for high quality aftermarket air induction products began to reach scale – Ron knew he had found an opportunity to make his mark on an industry he loved. Launching Injen – with a pioneering patent that allowed enthusiasts to achieve better performance from their vehicles without annoying “Check Engine Lights” (CEL’s) – Ron and his team have never waivered from their commitment to innovate and deliver products that solve for the increasingly complex nature of vehicles brought to market.
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