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SKU: HS15STIGM4SS
Invidia 2015-2020 Subaru WRX / STI Gemini/R400 Single Layer Quad Stainless Steel Tip Cat-Back Exhaust
This Invidia cat-back exhaust system (MPN: HS15STIGM4SS) replaces the factory exhaust from the catalytic converter back on 2015-2020 Subaru WRX and STI models. It features mandrel-bent 3-inch T304 stainless steel piping and quad single-layer R400 stainless tips for a deep aggressive tone and noticeable power increase. Drivers experience sharper throttle response and higher horsepower across the RPM range with this direct bolt-on upgrade.
Key Features
- T304 Stainless Steel Construction: Provides long-lasting durability and resistance to rust with full 304-grade stainless throughout the piping and tips.
- Mandrel-Bent 3-Inch Piping: Ensures smooth exhaust flow to reduce backpressure and support engine breathing for improved acceleration.
- Gemini Series Design: Delivers a refined deep exhaust note that grows louder under load without excessive drone on highways.
- Single Layer R400 Quad Tips: 4-inch diameter rolled stainless tips offer a clean angular look and enhance the rear stance of WRX/STI vehicles.
- Bolt-On Fitment: Precision-engineered hangers and flanges match OEM locations for straightforward installation without modifications.
Product Notes
- Requires stock catalytic converter. not for off-road or race use only applications.
- Clean periodically with mild soap to maintain stainless finish.
- Ships in oversized box. check local freight restrictions if applicable.
Installation Notes
- Professional installation recommended.
- Basic hand tools and jack stands sufficient. no welding needed.
- Uses factory rubber hangers and bolts for secure mounting.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2020 | Subaru | WRX | Base |
| 2015-2020 | Subaru | WRX | Limited |
| 2015-2020 | Subaru | WRX | Premium |
| 2015-2020 | Subaru | WRX STI | Base |
| 2015 | Subaru | WRX STI | Launch Edition |
| 2015-2020 | Subaru | WRX STI | Limited |
| 2016 | Subaru | WRX STI | Series.HyperBlue |
Why Choose Invidia?
- Established Japanese exhaust manufacturer with motorsport heritage.
- Every system dyno-tested for real-world power and sound validation.
- Robotic welding and TIG construction for consistent quality.
Frequently Asked Questions
-
Q: Will this fit my 2018 WRX Premium with stock downpipe?
A: Yes, it bolts directly to the stock catalytic converter on all listed 2015-2020 WRX and STI submodels without adapters. -
Q: What material are the tips made from?
A: R400 tips are single-layer T304 stainless steel, 101mm inlet/110mm outlet for durability and shine. -
Q: What warranty covers this exhaust?
A: Lifetime limited warranty against manufacturing defects when installed properly on compatible vehicles.
Shipping & Handling
- Method: UPS Ground or Freight for oversized items
- Availability: In stock - ships same or next business day
- Packaging: Securely boxed at 52in x 13in x 13in
- Weight: 42 lbs
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