991.2 GT3RS Products

Can be used with Dundon cat backs, 3" side deletes, or added to our Street Header package to give you the ultimate in Performance and Sound improvements. Will turn a beautiful shade of blue when driven hard!

Most of us have experienced the many issues associated with both the stock Steel and Ti rear mufflers on our beloved 991.2 GT3RS. cracking, holes, not passing sound etc...  We've been reinforcing both the Steel and Ti versions for years after they crack and understand why they fail quite well.  We set out to fix the weakness of the OEM center muffler and include an option for those that want their car to pass the more and more prevalent dB restricted tracks without losing power.  We finalized the design and have tested at numerous tracks both for longevity and for dB reduction.

We're happy to announce our GT3RS Lifetime Center Muffler.  It's available in 2 "flavors" Quiet and Loud.  The Quiet is for those customers looking for no drone* while cruising and to quiet the car at full boogie to attenuate some of the dB levels on the track or on the street.  The Loud is the muffler for those looking for no drone* at cruise, but a pronounced bark when getting on it!

We've tested the Quiet on a 991 GT3s with side muffler deletes that was 104dB before the muffler and passing a 90dB day after .  We've tested on a stock 991 GT3RS and the car passed where it hadn't previously. And we tested on a 997.2 GT3 that had not passed at Laguna and passed a 90dB day.  We've recorded the Orange GT3 Center Muffler in our own testing at 10-12dB reduction over the OEM GT3 Muffler.  All of the testing was done on cars WITHOUT GPS Exhaust flap closing devices.

• Lifetime Guaranteed including track use.
• 321 Stainless Steel coupled with a high strength design.
• Quiet has no power loss (up to 450whp engines), sounds great and reduces sound levels 10-12dB over stock.
• Loud less restriction on higher powered cars (>450whp) and wicked flat six waiil!
• 4" rolled exhaust tips in PVD Black are Standard.  Titanium Tips are optional!  Add our Nurburgring Quiet Tips to further quiet your car down!
• Direct replacement of the OEM muffler, will fit existing modification if they work with the OEM Center Muffler.
• OEM 63mm or 3" lower inlet sizing for increased flow.

* for no drone performance, the cars must maintain valves and use both the upper and lower exhaust paths in the muffler.

Available in OEM lower flow tube size for stock muffler or 3" lower flow tube size for use with Dundon Lifetime Mufflers

3" Lower Flow Path Offers

• 44% improvement in flow over stock
• 20% reduction in pressure drop over stock
• Use with Loud Muffler to have a bulletproof light weight track setup, with no drone

Use with Quiet Muffler to have a bulletproof light weight track setup for dB restricted tracks!

These 625 inconel inserts block the expansion chamber on the lower pathway, dramatically reducing the muffling effect. The combination of the titanium muffler with the loud inserts gives you the ultimate “have your cake, and eat it, too” exhaust. The quietest system we make at low-RPM, and one of the loudest when you mash the fun-pedal!

Inconel 625 is a nickel-based super alloy known for its incredible strength and durability, especially under intense heat. This strength allows us to use very thin material that just sneaks into the Titanium muffler inlet.

*NOT compatible with Steel mufflers.

Replacement tip sets for your Dundon Lifetime Muffler ONLY. Does NOT fit OE Porsche Mufflers. Proper tip length is important, so please ensure you select the correct application.

The Valkyrie Complete Aero Package includes: 

• Valkyrie Swan Neck Carbon Wing
• Dual Carbon Dive Planes
• Carbon Splitter with 3D-printed lip spoiler and vortex generators

The Complete Dundon aero package for the 991.2 GT3RS was designed to increase downforce while minimizing the drag coefficient. Using Computational Fluid Dynamics (CFD) allowed us to make a complete package, swan neck wing, dual carbon dive planes and front carbon splitter tailored to the shapes of Porsches 911's, Caymans and 911 Cups. 

A one size fits all approach may work a little bit, but is not optimized for your GT3RS.

The Complete Valkyrie Aero Package gives over 1500lbs of downforce at 160mph, almost 1000lbs more than a stock 991.2 GT3RS at maximum settings. All this at mild settings of 90mm ride height and 5* wing angle. 

While absolute numbers are great, where things count for aero isn't 160 or 200mph downforce numbers but 80-120mph numbers as this is generally the speed you are trying to turn the car and want your 911's aerodynamics to really help you.  

This is where our package really shines with 885lbs of downforce at 120mph, 550lbs more than stock at maximum settings

The Complete Valkyrie Aero Package includes:

• Valkyrie Swan Neck Wing 
• Dual Carbon Dive Planes 
• Full Carbon Splitter

Every Detail of the package was refined and designed to work together Look at the 100% Carbon Wing Ends for instance. Ours are 3 dimensional, with flowing prepreg carbon contours and cutouts to aid in vortex generation to further improve the Valkyrie wing's performance. All of this leads to a faster more planted car and a more confident driver 

The wing risers or wing uprights for our package are unique to the package as well. The uprights along with substantial reinforcement to the upright supports, and chassis set this kit apart! Think the stock uprights can support substantial downforce increases? Think again... 

The Full Carbon Splitter is reinforced real prepreg carbon fiber, not plastic. 

Brackets attach to the frame rails and chassis of the car 

Simple installation and removal 4 bolts and its on and off, no cutting or drilling required 

Diffusers, Vortex Generators and End Plates all Developed in Wind Tunnel Validated Computational Fluid Dynamics 

Shaped to take advantage of ground effects to promote more down force and less drag: Full Kit is less drag than the Valkyrie Wing and Dive planes alone with much more downforce. 

The Package is made to increase front downforce when the car is in Roll and Yaw (i.e: while turning), bringing the balance of pressure forward to help attack apexes with ease! 

You must upgrade you suspension for the full package.  Our MCS 3-way damper package is the perfect addition, is setup, tested and ready to go!  You can find it here!  

991.2 GT3RS MCS 3-Way Damper Package

Check the Pictures and Shoot us a message, call or email for more info! The Complete Valkyrie Aero Package will transform your 991.2 GT3RS.

Designed in CFD (computational fluid dynamics) to provide the maximum increase in downforce with minimal drag, our Dual Dive Planes and Valkyrie Swan Neck Wing increase downforce by nearly 2X 100mph (stock wing at 5°)! Constructed of beautiful gloss carbon fiber, these pieces add as much style as they do performance.

Includes:

• Dual Carbon Fiber Dive Planes
• Valkyrie Swan Neck Carbon Wing 

Our Carbon Splitter adds the front downforce needed to really take advantage of the Valkyrie Swan Neck Rear Wing. 

With the Splitter added to a 991.2 GT3RS running our Dual dive planes and Valkyrie wing a total of

885lbs of downforce at 120mph, a 550lb increase over the car stock is easily achieved

• Full Carbon Fiber Construction
• Brackets that attach to the frame rail and chassis of the car
• Simple installation and removal 4 bolts and its on and off!
• Diffusers, Vortex Generators and End Plates all Developed in Wind Tunnel Validated Computational Fluid Dynamics
• Shaped to take advantage of ground effects to promote more down force and less drag: 
• Full Kit is less drag than the Valkyrie Wing and Dive planes alone with much more downforce.
• The Package is made to increase front downforce when the car is in Roll and Yaw, bringing the balance of pressure forward to help attack apexes with ease!
• 885lbs* Downforce at 120mph 550lbs more downforce than the car stock at maximum wing angle
• *Ride height of 90mm, minimal rake and a Valkyrie Wing Angle of Attack (AoA) of 5*  out of 14*  

NOTICE: Tuning your ECU will be visible to Porsche and can potentially void your factory or aftermarket warranty. 

EMISSIONS

This part is legal under the provisions of EPA’s Anti-Tampering Policy. COBB Tuning has established a reasonable basis (testing results) to verify that this product allows the vehicle to operate within legal emissions standards and is therefore legal to be sold for on-street use in all states that accept the legal provisions of the Clean Air Act and EPA’s Anti-Tampering Policy.

NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY EMISSION CONTROLLED MOTOR VEHICLE.

Testing with the California Air Resources Board, in order to achieve 50-state compliance, is pending. Once testing is complete with California, and an EO number is issued, this product will be updated to 50-state legal status.
 

DESCRIPTION

The in-cabin mountable Accessport V3 has a large, full color, high resolution screen which allows you to monitor up to six parameters in real time. Fully customizable from the look (multiple bezel colors), layout (set up a race, street or dyno gauge cluster) and mounting options (choose from 1,000s of standard vehicle mounts). Of course, all of the great COBB tuning is included - with enough space for 100 calibrations. This is your new Accessport - and maybe the last one you'll ever need.

Warning! Installation of this Accessport over anything other than OEM or COBB software may result in ECU/TCU failure. Please contact COBB Support if you have any questions.

WHY?

The Accessport V3 is the world's best selling, most flexible ECU upgrade solution for Porsche. Unlock power hidden within the vehicle by replacing conservative factory settings with more aggressive calibrations. Upgrade forever with off-the-shelf (OTS) calibrations for most bolt-on modifications. It's the last engine management solution you'll ever need.

CLICK HERE FOR MAP NOTES, DYNO CHARTS AND POWER GAINS

For a long time you had to sacrifice your street drivability if you wanted to upgrade to a motorsports damper. No longer! These dampers improve your GT3RS or GT2RS's already formidable handling, while adding adjustability and forgiveness. We help make the car easier to drive at the limit and at the same time take that limit further.

Kit includes:

This is a comprehensive package that comes pre-assembled for a hassle-free install. We have tailored two spring packages depending on your use case. Track Springs for drivers looking to improve their track performance, but also maintain a street-friendly attitude. Our Race Spring option gives the car more support needed when using stickier tires (like a Hoosier or Racing Slick) and enhanced aerodynamics.

Kit includes:

Dundon-spec MCS 3-Way Adjustable Remote Damper System

4 Main Springs (Track rates or Race rates)

4 Tender Springs
Install Hardware Kit
Front & Rear Bearing Plates (upper mounts)
Reservoir Mounting Kits

KW PASM Delete Kit

Talk to us about adding a Dundon Track Day Setup package to complete your suspension overhaul!

Don't have a roll bar or you want to mount your MCS canisters elsewhere? Our rear canister mounting kit is perfect for you. The brackets slide ride into the rear carpet, no modification required and still easily accessible so you can adjust canister pressures on the fly.

Approach your 991.2 GT3RS or GT2RS upgrade journey in the right steps for you and how you use your car! The factory Weissach package takes care of a lot, and these packages handle the rest!

Our meticulously designed and carefully curated suspension packages are built to give you the improvement and adjustment you need. 

These packages will allow for a precise and accurate alignment with a wide range of camber, toe and caster settings. They also remove the remaining rubber from the suspension system, improving steering feel and turning your RS into a razor-sharp, corner-carving monster!

From simple things like achieving an accurate corner balance (adjustable sway bar end links) to increasing front track width (inner lower control arms) and correcting caster (front tension arms) you can upgrade incrementally or all at once.

991.2 GT3RS & GT2RS (with Weissach Package) Setup Packages Include:

Advanced: All the basics to get your first/initial track alignment dialed in.

• Extended Length Titanium Tie Rod Ends
• Adjustable Sway Bar End Links
• Front and Rear Shim Kit

Pro: Wider range of adjustment, more aggressive settings available to take advantage of Slicks or Hoosier track tires and removes the remaining rubber bushings from the suspension.

• Full Advanced Package 
• Extended-length Inner Lower Control Arms
• Front Adjustable Tension Arms

Our suspension parts utilize the highest quality teflon-lined FK bearings, high-grade studs and nuts, billet aluminum and Titanium construction (when applicable) and a unique, thoughtful design. 

• Tension arms allow the factory brake ducts to attach without further modification (no zip ties!).
• Lower Control Arms use extended studs allowing for more shims and increased negative camber.
• Titanium tie rod ends feature pinch bolts and extended threads for security when increasing track width and negative camber.
• Adjustable sway bar end links use pinch bolts for simple install and easy inspection.

Add a Motion Control Suspension coilover system for a complete transformation!

• MCS for 991 GT3RS with Front-Axle Lift
• MCS for 991 GT3RS without Front-Axle Lift

Approach your 991 GT3RS upgrade journey in the right steps for you and how you use your car! Improve your suspension beyond the factory Weissach Package cars!

Our meticulously designed and carefully curated suspension packages are built to give you the improvement and adjustment you need. 

These packages will allow for a precise and accurate alignment with a wide range of camber, toe and caster settings. They also remove rubber from the suspension system, improving steering feel and turning your GT3 into a razor-sharp, corner-carving monster!

From simple things like achieving an accurate corner balance (adjustable sway bar end links) to increasing front track width (inner lower control arms) and correcting caster (front tension arms) you can upgrade incrementally or all at once.

991 GT3RS (non Weissach Package) Setup Packages Include:

Basic: All the basics to get your first/initial track alignment dialed in.

• Extended Length Titanium Tie Rod Ends
• Adjustable Sway Bar End Links
• Front and Rear Shim Kit

Intermediate: Wider range of adjustment, more aggressive settings available to take advantage of Slicks or Hoosier track tires.

• Full Basic Package 
• Extended-length Inner Lower Control Arms
• Front Adjustable Tension Arms

Advanced: Get all the rubber out of the front suspension for the precise handling and razor sharp steering you've been missing.

• Full Intermediate Package
• Front Outer Lower Control Arms with Adjustable Caster Pucks

Pro: Get all the rubber out of the entire suspension for the precise handling and connection to the road.

• Full Advanced Package
• Rear Lower Control Arm (Inner + Outer)
• Rear Tension Arms “Dog Bones”

Our suspension parts utilize the highest quality teflon-lined FK bearings, high-grade studs and nuts, billet aluminum and Titanium construction (when applicable) and a unique, thoughtful design. 

• Tension arms allow the factory brake ducts to attach without further modification (no zip ties!).
• Lower Control Arms use extended studs allowing for more shims and increased negative camber.
• Titanium tie rod ends feature pinch bolts and extended threads for security when increasing track width and negative camber.
• Adjustable sway bar end links use pinch bolts for simple install and easy inspection.

Add a Motion Control Suspension coilover system for a complete transformation!

• MCS for 991 GT3RS with Front-Axle Lift
• MCS for 991 GT3RS without Front-Axle Lift

Great for track cars as we can build a custom map for the shocks for each track you go to, no more fiddling with knobs or trying various settings only to end up frustrated.  We can log the cars performance and make changes to your dampers settings so they dynamically adjust!

991 Carrera, Turbo, GT3, GT3RS

Check out our blog article and video for more info

http://www.dundonmotorsports.com/blog/what-is-dsc-sport

991.1/991.2 DSC Control Module

• Eliminates Preload: Adjustable links let you set the correct length during corner balancing, so the sway bar isn’t forced to twist to fit uneven ride heights.
• Restores Predictable Handling: By removing preload, handling remains consistent in both left and right turns.
• Maintains Proper Geometry: Adjustable links allow you to keep the sway bar arms parallel to the ground after lowering, preserving intended performance.

1. Increased Negative Camber

Our LCA's are slightly longer, and feature high-grade, extended length studs. This design allows for a taller shim stack to achieve more negative camber than what is available from the factory Porsche part.

2. Improved Handling and Grip

Our LCAs allow your car to haver a wider front track width, pair that with an increase in negative camber and you will notice a better "bite" during turn in, improved stability and higher cornering speeds.

3. Precision and "Feel"

Our LCAs feature upgraded bushing, no longer do you have to worry about worn out rubber bushings, we use high-grade Teflon-coated spherical bushings. This removes the "slop you get from the rubber variants and allows for much more precise steering feedback.

These LCAs also feature adjustable caster pucks so that you can readjust your caster (adjusting the wheel forward/backward within the wheel well) while adjusting camber.

4. Better Tire Wear

Dialing in your camber with our LCAs means more even tire wear. Our parts prevent the outer shoulder of your tire from wearing prematurely and ensures a more even distribution of heat and wear across the tread.