991.1 GT3RS Products

Taken from our GT3 Cup exhaust program, this exhaust is the ultimate in performance and sound. BUYER BEWARE! This system has drone and vibration (all things that racecars have) and is NOT for the faint of heart.

If you want it louder than all the rest, this is the one for you!

Contains:

• Dundon Street Headers (with our advanced catalytic converters)
• Inconel Crack Pipe muffler delete
• Hardware Kit

No valves, this thing is LOUD!

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.

We'd been asked by a few to make a Crack Pipe that wasn't as much of a commitment but still true to the original Megaphone Crack Pipe. Meet the Mini Crack, this one works with Dundon valved side muffler deletes or our Street Headers, for both 991 and 997! 992 cars will need our cat-back kit or our full street header package. The only sound better than a Porsche is the sound of a Porsche that’s earned its racing stripes. That’s why we’ve designed the Crack Pipe — the ultimate, unbridled expression of Porsche’s Motorsport DNA (with a little help from Dundon Motorsports). If you want to seriously turn heads at the track when you fly by, this is the one for you. It's still loud but the valves do take a bit of the edge off while cruising.

• Inconel 625
• Megaphones for enhanced wave strength (more power)
• Full 3.5" X Pipe merge

Not for the faint of heart, this is LOUD, screams like an RSR at full throttle. 

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.

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.

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.

• 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 have 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.

Complete set (of 6) rear "dog bone" control arms for your 991 GT3, GT3RS or 992 GT3. Remove rubber from the rear suspension for better feel, less slop, and more grip!