-38%
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
Shop catback exhaust systems at Black Ops Auto Works for cat-back exhaust kits, performance exhaust systems, stainless steel exhausts, titanium exhausts, dual rear exit exhausts, track exhausts, touring exhausts, axle-back exhausts, and street performance exhaust upgrades. This collection is built for drivers who want deeper sound, improved exhaust flow, better throttle response, aggressive rear-end styling, and vehicle-specific bolt-on fitment. Use this Catback collection to choose the right exhaust system by vehicle platform, brand, material, sound level, tip finish, and driving goal. A catback exhaust can help improve sound, reduce exhaust restriction, support performance upgrades, and give your car, truck, SUV, Jeep, or performance build a cleaner, more aggressive look. Shop Catback Exhaust Systems by Brand Black Ops Auto Works carries catback exhaust systems from trusted performance brands including Borla, CORSA Performance, MagnaFlow, MBRP, AWE Tuning, Invidia, Solo Performanc...
View Catback Products
Exhaust Systems
Black Ops Auto Works carries one of the largest selections of performance exhaust systems available online, with 7,700+ products covering cat-back exhausts, axle-back exhausts, turbo-back systems, downpipes, headers, mid-pipes, X-pipes, H-pipes, mufflers, resonators, catalytic converters, exhaust tips, and every component in between. Whether you're building a street car, a daily driver, a diesel truck, or a track build, the right exhaust upgrade is here. Shop by Exhaust System Type Cat-Back Exhaust Systems: The most popular performance exhaust upgrade. Replaces everything from the catalytic converter back for improved sound, better flow, and premium tip styling. Available in single exit, dual exit, and quad exit configurations. Axle-Back Exhaust Systems: A simpler bolt-on that replaces the rear section from the axle back. Best for drivers who want an improved exhaust note and cleaner tip appearance without a full system swap. Headers and Manifolds: Long tube headers and shorty h...
View Exhaust Systems Products
Invidia
At Invidia Exhaust, we are dedicated to creating exhaust systems that stand out for their exceptional craftsmanship, premium materials, and cutting-edge design. Our systems not only enhance vehicle performance but also elevate sound and aesthetics, catering to both racing enthusiasts and everyday drivers. Why Choose Invidia Exhaust? Performance Enhancement: Each exhaust system is meticulously engineered to reduce backpressure and boost engine output. Signature Sound: Experience an exhilarating exhaust note that sets you apart on the road. Precision Engineering: Designed using 3D scans of your vehicle's undercarriage for guaranteed precision fitment. Durable Materials: Made with Grade 304 stainless steel (or titanium for select systems) for exceptional durability and resistance to corrosion. Commitment to Quality With a commitment to ongoing technological innovation and stringent quality control, we ensure unparalleled performance, reliability, and durability in every product....
View Invidia ProductsLet customers speak for us
Looks pretty nice
Looks pretty nice, pricing was good and the reinforcement is a big plus.
Randy H.
Black Ops Auto Works
I emailed customer service to inquire about when it would be shipped
I emailed customer service to inquire about when it would be shipped. They checked and emailed me with the answer. Customer service is A1
Ralph J.
Black Ops Auto Works
Installation was easy
Installation was easy. The price is good and it looks great on the truck.
Ralph J.
RHO Small Grille Badge
Looks as good as it fits
Looks as good as it fits,
zachary d.
Seibon 70-73 Datsun 240Z OE Carbon Fiber Hood
Nothing like it
I love it great sound and response
Luis P.
Legmaker Dodge Durango HEMI Short Ram CAI 2011-Present 5.7L
Car totally diferent with the whole kit
Car totally diferent with the whole kit. Ive stood next to wide bodies and my car gets more attention at times . Ive bought the kit twice already.
Ding D.
2015-2023 Dodge Charger Carbon Fiber Wind Splitters
Fantastic emblem! Exactly what I was looking for
Fantastic emblem! Exactly what I was looking for. Great quality emblem.
Jacobus S.
Direct Connection Black Metallic Fender Badge
Worked great for my aftermarket hood on my Chrysler 2023 300C
Worked great for my aftermarket hood on my Chrysler 2023 300C. Thanks
Robert G.
Windshield Washer Squirter Relocation Kit Universal
Easy to install and makes car sound even better
Easy to install and makes car sound even better love the winn
Tracy H.
Legmaker Challenger/Charger Hellcat Demon & Redeye Air Intake
Awesome customer support
Awesome customer support. Had multiple issues with fedex and these guys were excellent in helping me sort everything out. The drop springs are great too! I highly recommend
Anonymous
Swift Spec-R Lowering springs Jeep Grand Cherokee 2011-2021
100/100! perfect CF crafted cold air intake for 6
100/100! perfect CF crafted cold air intake for 6.4 jeep .. even makes my AWE exhaust sound even deeper and you cam here this thing sucking when accelerating even at normal speeds🥶
srt.boizzz
Legmaker 392 TH Short Ram Jeep Grand Cherokee SRT 2012-2021
