-31%
Click to zoom in
SKU: HS15STIG3T
Invidia 2015–2021 Subaru WRX/STI 4Dr Q300 Twin Outlet Rolled Titanium Burnt Quad Tip Cat-Back Exhaust
The Invidia Q300 Twin Outlet Rolled Titanium Burnt Quad Tip Cat-Back Exhaust (HS15STIG3T) is engineered for 2015–2021 Subaru WRX and STI 4-door models to deliver superior performance, aggressive styling, and a refined exhaust note.
Hand-crafted using premium SUS304 stainless steel piping with mandrel bends, continuous piping design, and Advantex material for optimized back pressure. It features a flat-bottom muffler for aerodynamic efficiency, double-wall rolled titanium burnt quad tips for a premium burnt titanium finish, and robot TIG welding for unmatched durability and show-quality construction.
Key Features
- SUS304 Stainless Steel Construction: Mandrel-bent piping with 3-inch diameter for unrestricted exhaust flow and reduced back pressure.
- Advantex Muffler Technology: Continuous internal piping and acoustic dampening for deep, sporty tone without drone.
- Twin Outlet Quad Tip Design: Rolled burnt titanium tips (3.5-inch diameter) for aggressive aesthetics and heat resistance.
- Aerodynamic Flat-Bottom Muffler: Improves high-speed stability and reduces weight for better handling.
- OEM-Compatible Fit: Direct bolt-on installation using factory hangers and flanges (new gaskets and hardware included).
Product Notes
- Provides measurable gains in horsepower, torque, and throttle response while maintaining emissions compliance.
- Minimal cabin drone – ideal for daily driving with a refined boxer rumble under acceleration.
- Tips feature burnt titanium finish for a unique, premium look that resists discoloration.
Warranty: Lifetime limited warranty against manufacturing defects.
Installation Notes
- Professional installation recommended for optimal alignment and torque specs.
- Bolt-on design – no cutting or welding required; uses factory mounting points.
- Inspect for clearance with aftermarket downpipes or suspension mods before install.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015–2021 | Subaru | WRX | Sedan (Base, Premium, Limited) |
| 2015–2021 | Subaru | WRX | STI (Base, Limited) |
Why Choose Invidia Q300?
- Trusted leader in performance exhausts with race-proven designs for Subaru enthusiasts.
- Balances aggressive sound and performance without excessive noise or drone.
- Precision engineering for exact fitment, weight reduction, and long-term reliability.
Frequently Asked Questions
-
Q: Will this fit my 2018 STI Limited?
A: Yes, fully compatible with all 2015–2021 WRX and STI sedan models, including Limited trims. -
Q: How loud is the Q300 compared to the N1?
A: The Q300 offers a deeper, more refined tone with less drone than the louder N1, perfect for street use. -
Q: Does it require a tune or downpipe?
A: No tune needed, but pairs excellently with Invidia downpipes for maximum gains.
Shipping & Handling
- Method: Ground freight delivery only.
- Availability: Usually ships within 1-2 business days.
- Packaging: Securely crated with protective foam for transit damage prevention.
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