Invidia HS15STIGM4SS Exhaust System (Back Exhaust2015+ Subaru WRX/Sti Gemini/R400 Single Layer Quad Stainless Steel Tip Cat)
- The Invidia pipe Offers an alternative to other power-boosting enhancements.
- A quick look at its dyno chart shows it easily added several horse-power units to the stock exhaust system.
- Each Invidia pipe features a large 4-in stainless-steel Bell mount to enhance power by freeing excess gas.