PORSCHE 911 GT3 (991.1)
Performance upgrades for the 991.1 GT3
Exhaust, aero, suspension, brakes, wheels and track-focused upgrades for the 991.1 GT3.
- Engineered & tested in-house
- Track-proven performance
- Model-specific fitment guidance
- Dundon 30-day guarantee
991.1 GT3 Best Sellers
Start with your 991.1 GT3 goal
Choose the right upgrade path
Pick the goal first, then shop 991.1 GT3 parts that match how the car is actually used.
Sound
3 hand-picked products
I want sound, response, and less rear weight
Start with the exhaust path: freer flow, sharper response, retained drivability, and the right sound target for street miles or sound-restricted track days.
First mods
3 hand-picked products
I want the best first 991.1 GT3 mods
Compare the proven first steps owners usually ask about: exhaust character, aero balance, alignment support, brake confidence, and track-day setup.
Track
3 hand-picked products
I want more repeatable track sessions
Focus on the pieces that help the car stay predictable: alignment range, chassis control, brake support, wheel clearance, tire consistency, and sound compliance.
Shop by collection
Browse 991.1 GT3 upgrades by collection
Scan curated 991.1 GT3 upgrade collections without leaving the landing page.
991.1 GT3 Exhaust
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Pre-Owned 991 GT3/RS Street Header Lifetime Muffler Power Package
From $13,675.50 $12,195.00 -
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Dive into our distinguished Exhaust collection exclusively tailored for the Porsche 991.1 GT3. With a decade of racing heritage and an undying passion for Porsche, we understand the symphony of a perfectly tuned exhaust and the power it can unleash.
Venture into our extensive Porsche 991.1 GT3 product lineup and experience the harmony of engineering and artistry. Our exhaust systems are not just about the roar; they're about optimizing power, enhancing throttle response, and ensuring that your Porsche breathes with unmatched vigor.
Why Choose Dundon Motorsports for Your 991.1 GT3 Exhaust?
- Legacy & Innovation: A decade of immersion in Porsche dynamics ensures exhaust systems that resonate with both legacy and innovation.
- Track-Proven Performance: As a professional racer, I've ensured that our exhausts amplify your Porsche's track dynamics, pushing boundaries and setting records.
- Precision Engineering: Each exhaust system stands as a testament to our commitment to quality, performance, and the iconic Porsche spirit.
Step into the realm of performance parts for Porsche 991.1 GT3 and let your Porsche roar with authority and elegance, only with Dundon Motorsports.
991.1 GT3 Aerodynamics
7 products
With a decade of racing adrenaline and an unwavering dedication to Porsche, we recognize the pivotal role of aerodynamics in optimizing speed, stability, and handling. Our aerodynamic solutions are not just about aesthetics; they are about harnessing the air to work in favor of your Porsche, ensuring every drive feels like a lap on the racetrack.
Explore our comprehensive Porsche 991.1 GT3 product range and experience the fusion of design, functionality, and performance. Whether you're aiming for reduced drag, increased downforce, or enhanced stability, our Aerodynamics collection promises to transform your Porsche into a streamlined masterpiece.
Why Dundon Motorsports for Your 991.1 GT3 Aerodynamics?
- Performance-Driven Design: Our aerodynamic components are designed with a racer's perspective, ensuring tangible performance gains.
- Precision Engineering: A decade of Porsche passion ensures aerodynamic solutions that are both visually stunning and functionally superior.
- Track-Proven Excellence: As a professional racer, I've ensured that our aerodynamic components deliver unmatched performance, both on and off the track.
Embark on a journey of performance enhancements for Porsche 991.1 GT3 and let your Porsche slice through the air with elegance and efficiency, only with Dundon Motorsports.
991.1 GT3 Suspension
15 products
991.1 GT3 Brakes and Wheels
10 products
Introducing our elite Brakes and Wheels collection meticulously curated for the iconic Porsche 991.1 GT3. With a decade of racing experience and an unparalleled passion for Porsche, we recognize that control and grip are as crucial as speed and power. Our brakes and wheels are not just components; they are the very essence of safety, performance, and style.
Discover our comprehensive Porsche 991.1 GT3 product suite and experience the perfect blend of aesthetics and functionality. Whether you're tearing up the racetrack or carving the canyons, our Brakes and Wheels collection ensures that your Porsche remains grounded, responsive, and agile.
Why Dundon Motorsports for Your 991.1 GT3 Brakes and Wheels?
- Precision Crafted: A decade of Porsche expertise ensures components that deliver unmatched stopping power and cornering agility.
- Race-Ready Performance: As a professional racer, I've ensured that our products are track-tested and racer-approved, delivering peak performance in every scenario.
- Style Meets Substance: Our wheels are not just about looks; they're about lightweight performance, durability, and complementing the iconic Porsche design.
Embark on a journey of performance enhancements for Porsche 991.1 GT3 and redefine control and style with Dundon Motorsports.
991.1 GT3 Power packages
4 products-
D3 Street Header/93mm Intake Kit/Optional Lifetime Muffler Power Package (2014-2016 991.1 GT3)
From $19,320.00 $18,465.00 -
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Pre-Owned 991 GT3/RS Street Header Lifetime Muffler Power Package
From $13,675.50 $12,195.00
With a decade of racing prowess and an insatiable passion for Porsche, we understand that true power is a symphony of perfectly harmonized components. Our Power Packages are not merely bundles; they are comprehensive performance solutions, meticulously crafted to unleash the beast within your Porsche.
Dive into our extensive Porsche 991.1 GT3 product assortment and witness the culmination of engineering brilliance and racing heritage. Whether you're aiming for podium finishes or seeking unmatched road dominance, our Power Packages promise to transform your Porsche into a performance titan.
Why Choose Dundon Motorsports for Your 991.1 GT3 Power Packages?
- Holistic Performance: Our packages are a fusion of components, ensuring every aspect of your Porsche's performance is supercharged.
- Racing Pedigree: A decade on the racetrack has equipped us with insights to craft packages that resonate with the Porsche racing spirit.
- Uncompromised Quality: Each package is a testament to our commitment to quality, innovation, and the iconic Porsche legacy.
Step into the world of performance parts for Porsche 991.1 GT3 and experience power like never before, only with Dundon Motorsports.
Tools & Safety
16 products
Navigate through a selection of products that are not only designed to safeguard but also to empower. From robust tools that ensure your vehicle is always performing at its best, to safety gear that shields and secures, every product is crafted with the utmost precision and care.
As experts and enthusiasts in the world of motorsports, we understand that the thrill of the drive should always be in harmony with the assurance of safety and the right tools at your disposal.
From precision tools that ensure your vehicle is tuned to perfection, to safety gear that protects and enhances your driving experience, every item is a testament to our commitment to quality, safety, and performance.
As experts and enthusiasts in the world of motorsports, we understand that the thrill of the drive should always be in harmony with the assurance of safety and the right tools at your disposal.
From precision tools that ensure your vehicle is tuned to perfection, to safety gear that protects and enhances your driving experience, every item is a testament to our commitment to quality, safety, and performance.
991.1 GT3 Pre-Owned
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Pre-Owned 991 GT3/RS Street Header Lifetime Muffler Power Package
From $13,675.50 $12,195.00
At Dundon Motorsports, we understand the allure of the Porsche 991.1 GT3. Its legacy in the racing world is unparalleled, and its performance on the road is nothing short of legendary. For enthusiasts who seek the thrill of this iconic model without the brand-new price tag, our collection of pre-owned components offers the perfect solution.
Every pre-owned part in our collection undergoes rigorous testing and inspection to ensure it meets the high standards synonymous with the Porsche brand. Whether you're looking to replace a specific component or enhance the overall performance of your 991.1 GT3, our pre-owned collection promises quality, reliability, and the authentic Porsche experience.
Discover the world of Porsche 991.1 GT3 products and dive deep into a realm of unmatched performance and luxury. With Dundon Motorsports, you're not just buying a part; you're investing in a legacy.
Why Opt for Dundon Motorsports' Pre-Owned Collection?
- Authentic Porsche Experience: Every component is genuine, ensuring you get the true Porsche experience.
- Quality Assurance: Our decade-long expertise in Porsche ensures that every pre-owned part meets stringent quality standards.
- Value for Money: Get the performance and luxury of the 991.1 GT3 without the brand-new price tag.
Dundon Motorsports is not just a name; it's a promise of excellence, performance, and an unmatched Porsche experience.
Customer Reviews
Overall rating: 5 / 5 from 445 reviews.
!Great exhaust system! Unbelievable quiet inside the car and superb sound outside. Power gains to be tested soon in track. Regards 🏁🙌🏻
Dundon Motorsports products are the pinnacle of engineering and quality. From the fit and finish, to the incredible packaging and quick shipment of products, you won't be disappointed. As far as customer support, there really is no comparison since they are the leaders in assisting their clientele achieving complete satisfaction.
The Titanium muffler and header package has taken my 3RS to a new level. I have often received comments at the track saying that my car is the best sounding car at the track.
Thank you Charles, Jamie, Ted and the crew at Dundon for taking such great care of me and your customers. You guys are a class act and have always gone above and beyond. Much appreciated! Nick
Excellent product!
Fast shipping, great product, got labor day discount applied! Gt3 can finally breathe without the particulate filter.
Everything went great with the installation
Great experience Thanks for the speedy turn around
it was very nice kit
Dundon Motorsports Suspension Setup Package for 991 Turbo/Turbo S
Excellent support and quality of parts for my 997.1 GT3 RS. The tolerances and quality of the parts are perfect
Amazing! Love the sound and the added throttle response—it’s like the GT3 just woke up and is ready to play. Absolutely transformed the driving experience. Great job, Dundon team!
Dundon never disappoints! Installation was a breeze and everything fit exactly like you would expect.
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Allowed us to pass a 92db limit at Mont Tremblant in Canada
Allowed us to pass a 92db limit at Mont Tremblant in Canada
Perfect fit…would recommend!
Great experience. The spacer kit was exactly what we needed
Good Fitment! Thanks again.
Thank you guys! System turned out great. Sounds amazing. Tech support from Ted and Charlie was first class! They really went above and beyond! We really appreciate your partnership.
I received the Accessport device very quickly from Dundon, and found the process of uploading the ECU maps to be a simple and smooth process. I previously had OTS tunes from Softronic and Cobb, but I have to say.. what a remarkable change the custom one from Dundon has over the others. The support from both Charles and Jamie has been great. They provided useful context and slight revisions to the tune based on performance data logs that are captured by the device. The tuning is still ongoing, but I’m very pleased with the results thus far. Highly recommend!
981 GT4 Cayman, 991.1 Carrera/S, Cobb Accessport with Dundon Pro Tune
Great quality! Just print instructions and make sure to print template at 100% . 67 lb paper is perfect for template..
Amazing customer service and the most amazing sounding exhaust ever. Discovered a hole in the muffler of my GT3 and they found a replacement and had it to me the next day so we could install it for upcoming weekend HPDE. Fits perfectly and sounds so much better than the Porsche stock muffler. Can’t thank Dundon enough for their product and service backing it up.
These are the same as OEM, but much more convenient when they arrive with the exhaust so I don't have to run to the dealership and grab them.
We had a combination of the Dundon headers with the crack pipe exhaust and decided we needed a change after getting black flagged at our local track for blowing clear through the noise ordinance. Dundon's quiet muffler reduced our noise to an acceptable level and still sounds great. The quiet muffler removed any drone we had with the crack pipe and made driving the car much more reasonable. If we need to reduce sound levels more, we can easily add the quiet tips - it's nice to have modularity.
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This is a fantastic product that saves time and makes it easy for an individual to change their wheels. The custom case is a nice added value.
Quality is great and fits like OEM!
Carbon Wind Deflectors for 992 Carrera, GT3, GT3RS and Turbo
VERY FAST SHIPPING AND NICE PRODUCT TKS AGAIN GUYS
Perfect fit and easy installation. Noticeable performance improvement on track, especially in longer straights. 3-4 mph higher speed on back straight at Sebring…and sound great.
Perfect balance of sound and performance. My car walks away from other 992 GT3s on the straights and sounds spectacular. Noticeable difference in on track performance.
Awesome
Great solution to Wind buffeting done in style
Carbon Wind Deflectors for 992 Carrera, GT3, GT3RS and Turbo
Great quality matching OEM carbon fiber
Amazing system, when the valves are closed it’s basically oem, once you open them the car screams! Used with catless headers. Greta product!
Great customer service and people who stand by their product 100%
Perfect fitment and adjustability for any occasion, track and street compatible
Fantastic product, customer service, and even packaging. Dundon is a super high quality product and I think the best in the business (I have had other systems from other companies). Easy decision for any Porsche.
992 GT3/RS Catalytic Converter Pair for Dundon Street Headers - Foundational
Step 1: Receive Package: Complete. No visible damage. Step 2: Arrange a shop to install: In Progress. Step 3: Drive it hard!: ….can’t wait!! Thanks to the Dundon team for their assistance & support to answer my questions and help tailor the kit to my needs. Looking forward to Step 3. BG
It’s been awesome so far!
10/10 would recommend. The sound is incredible from how loud it is to the tone. I wish I did this sooner.
EXPERT FITMENT HELP
Build the 991.1 GT3 around the way you actually drive.
Not sure whether to start with exhaust, aero, suspension, brakes, wheels or a full track-day setup? A Dundon specialist can help match the upgrade path to your 991.1 GT3, tracks, sound limits and goals.
- Goal-based setup Street, HPDE, time trial, sound-limited circuits or mixed-use builds.
- System fitment Exhaust, aero, suspension, brake, wheel and tire choices checked together.
- Confidence before checkout A clearer 991.1 GT3 upgrade path before committing to premium parts.
- Choosing a selection results in a full page refresh.