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SKU: HS15SW4GTP
Invidia 2015-2021 Subaru WRX/STI Single N1 Stainless Steel Tip Cat-back Exhaust
This Invidia cat-back exhaust system HS15SW4GTP replaces the stock setup from the catalytic converter back with mandrel-bent T304 stainless steel piping. Designed for 2015-2021 Subaru WRX and STI models it delivers noticeable horsepower and torque gains through improved exhaust flow. The single 4-inch N1 tip produces a refined aggressive exhaust note perfect for track or street driving.
Key Features
- T304 Stainless Steel Construction: Full SUS304 piping and muffler resist corrosion for long-lasting durability in all conditions
- 3-Inch Mandrel-Bent Piping: Smooth bends reduce backpressure and increase exhaust velocity for better engine breathing and power delivery
- Single 4-Inch N1 Rolled Tip: Polished stainless steel 101mm tip with rolled edge adds bold styling and enhances the deep throaty sound
- Double Wall Muffler Design: Reduces interior drone while amplifying exterior volume for balanced performance sound
- Direct Bolt-On Fitment: Precision-engineered hangers and flanges ensure easy replacement without modifications
Product Notes
- Requires stock catalytic converter or high-flow cat for installation
- Clean periodically with mild soap to maintain finish
- Ships fully assembled with all necessary gaskets and hardware
Installation Notes
- Professional installation recommended.
- Lift vehicle and support exhaust during removal of stock system
- Uses factory mounting points and includes stainless steel clamps
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2021 | Subaru | WRX | Base |
| 2015-2021 | Subaru | WRX | Limited |
| 2015-2021 | Subaru | WRX | Premium |
| 2015-2021 | Subaru | WRX STI | Base |
| 2015 | Subaru | WRX STI | Launch Edition |
| 2015-2021 | Subaru | WRX STI | Limited |
| 2016 | Subaru | WRX STI | Series.HyperBlue |
Why Choose Invidia?
- Trusted JDM brand with motorsport heritage
- Robus TIG-welded construction for strength
- Engineered in Japan for Subaru FA/FJ engines
Frequently Asked Questions
-
Q: Does this fit 2015-2021 WRX STI models with stock downpipe?
A: Yes it bolts directly to the stock or aftermarket downpipe on all listed 2015-2021 WRX and STI trims without cutting or welding -
Q: What material is used for the piping and tip?
A: Entire system uses T304 stainless steel piping with a polished SUS304 single N1 tip for heat and rust resistance -
Q: What warranty coverage applies?
A: Invidia provides a limited lifetime warranty against manufacturing defects on welds and material
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Securely boxed 48 x 14 x 14 inches
- Weight: 35 lbs shipping 28 lbs product
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