991.1 GT3 Products

38lbft and 50whp gains (with Race Headers)

Includes:

• Street Headers
• OEM Touring Airbox
• 93mm TB/Center Plenum
• Optional Lifetime Muffler

Only Race Header/Lifetime Muffler/ Touring Airbox/ 93mm Center Plenum Dyno available.

Dundon Street (Catted) tuned length headers and valved side delete exhaust system for the 991.1 GT3! We were able to keep all of the things that people love about our race headers:

• less weight
• more power,
• great sound,
• quiet when you want it to be
• no drone
• lifetime structural warranty
• 100% 30day money back guarantee

• if you try it and don't like it, send it back we'll give you your money back!

We use 321SS (a superior grade of Stainless steel to the cheaper 304SS) and use a metal core spiral wound 200CPSI catalytic converter. All our products are mfg in the USA in our shop in Gig Harbor, WA.

By routing the primaries up and positioning the catalytic converter more vertical we were able to retain 99% of the primary length of the race system. This is how we are able to achieve 25whp gains on the 991.1 GT3.

You get everything you love about the Dundon Race Headers; 321 SS construction, industry leading power, lifetime structural warranty, and 100% money back guarantee, if you try it and don't like it, send it back we'll give you your money back!

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!

For a long time you had to sacrifice your street drivability if you wanted to upgrade to a motorsports damper. No longer! Our Dundon-spec MCS 3-Way dampers improve your GT3'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.

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 Camber Plates (upper mounts)

New Front-Axle Lift Cups
Reservoir Mounting Kits

PASM Delete Kit

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

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!

Dundon Street (Catted) tuned length headers and valved side delete exhaust system for the 991.1 GT3! We were able to keep all of the things that people love about our race headers:

• less weight
• more power,
• great sound,
• quiet when you want it to be
• no drone
• lifetime structural warranty
• 100% 30day money back guarantee

• if you try it and don't like it, send it back we'll give you your money back!

We use 321SS (a superior grade of Stainless steel to the cheaper 304SS) and use a metal core spiral wound 200CPSI catalytic converter. All our products are mfg in the USA in our shop in Gig Harbor, WA.

By routing the primaries up and positioning the catalytic converter more vertical we were able to retain 99% of the primary length of the race system. This is how we are able to achieve 25whp gains on the 991.1 GT3.

You get everything you love about the Dundon Race Headers; 321 SS construction, industry leading power, lifetime structural warranty, and 100% money back guarantee, if you try it and don't like it, send it back we'll give you your money back!

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.

ONLY FOR 991.1 GT3 or GT3RS with our Swan Neck Rear Wing. Adding this to a car with stock rear wing will make the car unstable due to too much front downforce. Add much needed front downforce to your GT3RS. Designed to complement the 991 GT3RS Swan Neck Wing Package.

For a long time you had to sacrifice your street drivability if you wanted to upgrade to a motorsports damper. No longer! Our Dundon-spec MCS 3-Way dampers improve your GT3'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.

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 Camber Plates (upper mounts)

New Front-Axle Lift Cups
Reservoir Mounting Kits

PASM Delete Kit

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

For a long time you had to sacrifice your street drivability if you wanted to upgrade to a motorsports damper. No longer! Our custom Dundon-spec MCS dampers offer incredible drivability on the road and stunning on-track performance to take your 991.1 or 991.2 GT3 to the next level. 

This is a comprehensive package that comes pre-assembled for a hassle-free install. We have tailored three spring packages depending on your use case. Street Springs give you supreme ride quality and comfort while raising the bar of the platform. 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 Remote Damper System
Install Hardware Kit

Front Camber Plates
Rear Camber Plates

Curated Spring package (Track or Race)
Reservoir Mounting Kits

KW PASM Delete Module

Pre-Assembled for easy setup and install

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 GT3 upgrade journey in the right steps for you and how you use your car!

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 GT3 Setup Packages Include:

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

• +3mm Front Inner Lower Control Arms (w/ extended studs)
• 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 
• 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 whole suspension for the precise handling and razor sharp steering you've been missing.

• 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 GT3 with Front-Axle Lift
• MCS for 991 GT3 without Front-Axle Lift

• Stock Brake ducts attach directly to the Dundon Tension Arms!

• No zip ties!
• No brake duct flopping around.

• Tension arm shims ARE included.

• 0.8mm x4 qty
• 1.6mm x 2 qty
• 3.2mm x2 qty
• 9.5mm x2 qty
• 12.7mm x2 qty
• EASILY adjust caster to properly dial in your wheel position and alignment.
• Grade 10.9 12-point nuts and washers included
• High-grade Teflon-lined FK bearings

• 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.

When dialing in a track setup on modern GT Porsches, increasing negative camber is a great way to improve front grip and extend tire life. However, the stock tie rods limit how much camber is possible. Dundon Motorsports' Titanium Extended Length Tie Rod ends offer adjustable rods with extended length threads to allow for a more aggressive track alignment without the risk of too-little threads attaching to the steering rack. 

Titanium rod construction keeps unsprung weight down to improve steering feel and performance. We also use high-quality rod-ends, ARP high-strength bolts and spherical bearings paired with a 2-bolt titanium pinch clamp for easy install and adjustment.

Fits all:

996 GT3/RS

997 GT3/RS

997 GT2/RS

991 GT3/RS

981 GT4

991 GT2RS

982/718 GT4/RS

992 GT3

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

We found in our exhaust development and testing of the 991.2 GT3 and RS that they are intake limited both through the factory airfilter box and through the 82mm Throttle body. A bit of history. The Bosch 82mm Throttle body is the largest Bosch makes and was used as far back as the 996 GT3 which made 380hp. The Air filter box used on the 991.2 GT3 and the 991.2 GT3RS originally showed up on the 2013 991 Carrera S which makes 350hp. Your 991.2 GT3 is rated at 500hp, so you can see just from these numbers that the intake side of things is a constriction.  

In our testing we found the the stock airbox to be about a 0.2-0.3psi pressure loss and the 82mm throttle body to be about 0.3-0.4psi of pressure loss. Naturally aspirated engines make power from the force of the atmosphere pushing air into the engine, so every 0.1 psi helps! Our combo of 93mm Throttle Body and Dual Cone Airbox reduces the losses to under 0.1psi.

We tried both our airbox and the 991.2 GT3 Touring Airbox and found our airbox to only be slightly better but the Touring box is less expensive, so we decided to include the Touring airbox for the single opening decklid cars. (991.1 GT3, 911R and Touring)

Dual Cone Filters

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