SKU: HS15SWADOC
Invidia 2015-2021 Subaru WRX Automatic Transmission Downpipe with High Flow Cat
The Invidia HS15SWADOC downpipe replaces the restrictive factory unit on 2015-2021 Subaru WRX automatic transmission models. Crafted from premium T304 stainless steel this part delivers smoother exhaust flow for noticeable gains in horsepower and torque. It fits Base Premium and Limited trims with direct bolt-on installation while including a high flow catalytic converter for balanced performance.
Key Features
- Mandrel-Bent T304 Stainless Steel: Provides corrosion resistance and consistent diameter for unrestricted exhaust flow
- High Flow Catalytic Converter: Lowers backpressure to improve engine breathing and throttle response without sacrificing emissions standards
- 3-Inch Diameter Piping: Allows higher exhaust velocity for power increases of 10-15 horsepower and enhanced turbo spool
- Direct Bolt-On Design: Matches OEM mounting points for straightforward replacement on WRX CVT models
- Polished Finish: Adds undercarriage style with durable mirror-polished surface that resists heat discoloration
Product Notes
- Designed exclusively for automatic transmission Subaru WRX models
- High flow cat supports EPA testing compliance for street use
- Ships securely packaged to prevent damage during transit
Installation Notes
- Professional installation recommended.
- Requires removal of factory downpipe and catalytic converter assembly
- Compatible with stock O2 sensors and hangers no additional hardware needed
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2021 | Subaru | WRX | Base |
| 2015-2021 | Subaru | WRX | Limited |
| 2015-2021 | Subaru | WRX | Premium |
Why Choose Invidia?
- Established Japanese exhaust manufacturer with motorsport heritage
- Uses only high-grade T304 stainless steel for longevity
- Engineered for precise fit and real-world power gains
Frequently Asked Questions
- Q: Does this fit 2018-2021 Subaru WRX automatic models?
A: Yes HS15SWADOC bolts directly to 2015-2021 WRX CVT models including Base Premium and Limited trims - Q: What material is the downpipe made from?
A: Constructed from full T304 stainless steel with mandrel bending for durability and smooth flow - Q: What warranty coverage is provided?
A: Backed by Invidia’s limited lifetime warranty against manufacturing defects when installed properly
Shipping & Handling
- Method: UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Ships in one reinforced box approximately 40in x 12in x 8in
- Weight: 11 lbs
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