991.2 Speedster Products

The 992 GT3 and 991.2 Speedster mark a drastic departure in exhaust configuration when compared with the last 15+ years of 911 GT3. Gone are the large side mufflers and nearly universal center muffler. The 992 platform has a gigantic and complicated center muffler that has the electronic valves built in. 

To find the best combination of weight, sound and performance is an incredibly subjective thing. With that in mind, we have created a modular system that includes the following:

-OPF Adapters (cone-shaped pieces with v-band attachment).

-Valve Sections (these look like the 997/991 valve sections, but accept the OE Electronic Valve Actuator, so your valves will operate just like stock).

-Muffler Replacement (many options to choose from, this will have the biggest impact on volume, drone, and tone).

With options for every driver, Dundon has the system for you! Everything from reliable, bomb-proof 321 Stainless Steel muffler, or our sublime Titanium Ultralight muffler to the insane Inconel 625 mini-crack pipe, you can pick the perfect pairing for your needs. 

These systems will be compatible with our forthcoming header system. Yes, you read that correctly: buy the cat-back, and you can add Dundon Headers later!

The 992 GT3 and 991.2 Speedster mark a drastic departure in exhaust configuration when compared with the last 15+ years of 911 GT3. Gone are the large side mufflers and nearly universal center muffler. The 992 platform has a gigantic and complicated center muffler that has the electronic valves built in. 

To find the best combination of weight, sound and performance is an incredibly subjective thing. With that in mind, we have created a modular system that includes the following:

-OPF Adapters (cone-shaped pieces with v-band attachment).

-Valve Sections (these look like the 997/991 valve sections, but accept the OE Electronic Valve Actuator, so your valves will operate just like stock).

-Muffler Replacement (many options to choose from, this will have the biggest impact on volume, drone, and tone).

With options for every driver, Dundon has the system for you! Everything from reliable, bomb-proof 321 Stainless Steel muffler, or our sublime Titanium Ultralight muffler to the insane Inconel 625 mini-crack pipe, you can pick the perfect pairing for your needs. 

These systems will be compatible with our forthcoming header system. Yes, you read that correctly: buy the cat-back, and you can add Dundon Headers later!

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. 

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.