-31%
Click to zoom in
SKU: HS15STIG3S
Invidia 2015-2021 Subaru WRX/STI 4Dr Q300 Twin Outlet Rolled Stainless Steel Quad Tip Cat-Back Exhaust
Upgrade your 2015-2021 Subaru WRX or STI 4-door sedan with the Invidia Q300 cat-back exhaust system HS15STIG3S. This full cat-back replaces the exhaust from the catalytic converter back for noticeable power increases and a refined aggressive sound. Mandrel-bent T304 stainless steel piping ensures smooth exhaust flow and durability on the street or track.
Key Features
- T304 Stainless Steel Build: Premium grade construction resists corrosion and withstands high heat for long-lasting performance.
- Mandrel Bent 3-inch Piping: Smooth bends minimize backpressure to boost horsepower torque and throttle response.
- Q300 Muffler Technology: Large canister design produces a deep throaty tone with minimal interior drone during cruising.
- Quad Rolled Stainless Tips: Twin outlet 4-inch diameter rolled-edge tips in polished stainless steel for precise fit and bold rear styling.
- Bolt-On Design: Direct replacement using factory mounting points for straightforward installation and reliable seal.
Product Notes
- Retains factory catalytic converter and O2 sensors for emissions compliance.
- Inspect clamps and hardware during seasonal maintenance to preserve performance.
- Packaged in heavy-duty box to protect components during transit.
Installation Notes
- Professional installation recommended.
- Bolt-on system requires basic tools no welding or cutting needed.
- Compatible with factory resonators and hangers reuse OEM gaskets where possible.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2016 | Subaru | WRX | Base |
| 2015-2016 | Subaru | WRX | Limited |
| 2015-2016 | Subaru | WRX | Premium |
| 2015-2016 | Subaru | WRX STI | Base |
| 2015 | Subaru | WRX STI | Launch Edition |
| 2015-2016 | Subaru | WRX STI | Limited |
| 2016 | Subaru | WRX STI | Series.HyperBlue |
| 2017-2021 | Subaru | WRX | All Sedans |
| 2017-2021 | Subaru | WRX STI | All Sedans |
Why Choose Invidia?
- 20+ years specializing in performance exhaust for Japanese cars.
- JASMA certified piping meets strict quality standards.
- Precision engineering from CAD design to dyno testing.
Frequently Asked Questions
-
Q: Will HS15STIG3S fit my 2018 Subaru WRX sedan?
A: Yes it bolts directly onto all 2015-2021 WRX and STI 4-door sedan models using factory hangers and mounts. -
Q: What material is used in the piping and tips?
A: Full T304 stainless steel piping and rolled quad tips provide heat resistance and a mirror-polished finish. -
Q: What is the warranty and install process?
A: Invidia provides a 1-year manufacturer warranty. Install takes 1-2 hours with basic lift and tools professional help advised for alignment.
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Oversized reinforced box 48in L x 14in W x 14in H
- Weight: 41 lbs product 50 lbs shipping
Catback
A catback exhaust system replaces everything from the catalytic converter back, covering the mid pipe, muffler, and tailpipe section in one bolt on upgrade. This collection covers catback systems for trucks, Jeeps, muscle cars, imports, and performance SUVs, giving you a straightforward way to improve sound, exhaust flow, and rear end styling without touching the factory catalytic converters or front pipe. Catback systems are available in stainless steel and titanium construction, with dual rear exit, single exit, and quad tip configurations, and a range of sound levels from mild touring tone to aggressive track character. Whether you want a deeper daily driver sound or a full track ready exhaust note, you will find a matched system for your platform here. What This Category Covers This collection includes complete catback exhaust systems, cat-back kits, dual rear exit systems, axle back adjacent catback upgrades, stainless steel and titanium exhaust systems, and street, tourin...
View Catback Products
Exhaust Systems
Performance exhaust systems for cars, trucks, SUVs, and Jeeps are stocked at Black Ops Auto Works. Shop cat-back systems, axle-back systems, turbo-back systems, headers, downpipes, mid-pipes, mufflers, resonators, catalytic converters, exhaust tips, exhaust valve controllers, oxygen sensors, exhaust brakes, and motorcycle and powersports exhausts for Mustang, Camaro, Challenger, Corvette, Silverado, and Super Duty platforms. Every product is filterable by exhaust position, material, pipe diameter, and vehicle year, make, model, and trim so the correct fitment ships the first time. Black Ops Auto Works carries 7,441 exhaust SKUs across every position of the exhaust system. What This Category Covers Exhaust upgrades change sound, appearance, and in some cases power. Exhaust fitment depends on engine, drivetrain, and factory exit position, so confirm the exact platform before ordering any exhaust component. Exhaust Position Cat-back, axle-back, turbo-back, and header-back systems e...
View Exhaust Systems Products
Invidia
Invidia for Subaru WRX, STI, BRZ, Honda Civic and Type R, Mitsubishi EVO, Nissan 350Z, Toyota GR Corolla, Supra, GT-R, and Volkswagen GTI builds are stocked at Black Ops Auto Works. Shop N1, Q300, R400, Gemini, cat-back, axle-back, front pipe, downpipe, J-pipe, and mid-pipe exhaust components. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 221 Invidia SKUs across vehicle-specific performance categories. About Invidia Invidia focuses on vehicle-specific stainless steel and titanium exhaust systems for Japanese and import sport platforms. Its catalog covers refined street sound and aggressive track-inspired options, with proven applications for turbocharged Subaru, Honda, Mitsubishi, Nissan, Toyota, and Volkswagen vehicles. Vehicle-Specific Selection Use the application details on each listing to narrow the selection to the exact platform. Product availability and specifications ...
View Invidia Products