1. Eliminates the OPF  2. No Check Engine Lights, and no tuning required  3. 992 GT3 Stock - 448whp, 992 GT3 with Street Headers is 476whp (so far)… 4. Weight savings over stock: 321 Stainless Steel Muffler version: 10 lbs lighter than stock Titanium...

Dundon Street (Catted) tuned length headers and valved side delete exhaust system for the 991GT3 991 GT3RS and 911R are available now! *Muffler shown is not included with the system, only to see how the system goes together!! Technical Description We were able to...

Less weight, more power, great sound, no drone, and no CEL. This is the Dundon Long Tube Street Header Exhaust. Technical Description Dundon Street (Catted) Long Tube header and valved side delete exhaust system for the 991 GT3RS and 911R are available now!   less weight more...

Want less weight, more power, great sound, and no drone for your 991.1 GT3? You've found it in our Long Tube Street Header Exhaust System. Technical Description Dundon Street (Catted) tuned length headers and valved side delete exhaust system for the 991.1 GT3  RS and 991.2...

Achieve 50lbft and almost 20whp gains on your 991.2 GT3 Touring with our Long Tube Street Header Exhaust System. Technical Description * Muffler shown is not included with the system, only to see how the system goes together!   less weight more power great sound...

Dundon Street (Catted) tuned length headers and valved side delete exhaust system for the 997.2 GT3RS are available now! We were able to keep all of the things that people love about our race headers: scroll down to learn more! *V2.0 Headers shown -...

Dundon Street (Catted) tuned length headers and valved side delete exhaust system for the 997.1 GT3 and GT3RS are available now! We were able to keep all of the things that people love about our race headers; keep scrolling! *V2.0 Headers shown - Updated...

Get your 718 GT4 Spyder GTS to sound as it should! Gain 30 HP to the wheels , Lose Weight and get the sounds you're craving, all with a lifetime warranty! Technical Description From our blog post on the 718 GT4 Street Headers: This...

Pre-owned header system. Inspected and ready to install. Expect heat discoloration and light cosmetic wear from use. Pre-Owned Header System for 991.1 and 991.2 GT3, GT3RS, 911R and GT3 Touring. 2.5" Outlets are for use with Stock Muffler and 3.0" Outlets are for use...

Your 992 GT3 is an amazing car — we just think it is lacking in the sound department. Dundon Motorsports' Cat-Back Exhaust System fixes that: no CEL, no codes, no lights, just that great Dundon Sound! Photographs are illustrative only, production parts will look...

Your 992 GT3 gets nearly everything right. The sound isn't one of them. This is the EU/RoW fitment of Dundon Motorsports' Cat-Back Exhaust System: No CEL, No Codes, No tune required, just pure sound! Photographs are illustrative only, production parts will look different. Technical...

At Dundon, we test our products endlessly to ensure the utmost quality. And over time, we found the factory muffler couldn’t keep up with the added performance our Headers provide. We set out to fix that. The result — Dundon’s GT3 Lifetime Center Muffler....

Dundon Street (Catted) tuned length headers and valved side delete exhaust system for the 991.2 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...

You Want Great Sound?You Want Drone Free?You Want the LIGHTEST muffler for your Porsche? We've got what you're looking for! Our Titanium Ultralight GT3 Muffler is all of the above, with a signature Titanium shriek at high rpm, and no bleeding ears on the...

Hardware Kit to Install a 321SS Lifetime Dundon Muffler on 997 and 991 GT3/RS cars. Kit includes: Flanges (2.5" for stock headers or 3" for Dundon Headers) "Donut" gaskets 12 lock nuts

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.

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,...

Need to dial it back a little bit? Get a meatball flag at your last track day? Our Quiet Tips take the edge off for the sound meter, but not your car's performance! Technical Description With the unique design that doesn’t sacrifice looks, the...

Enjoy 347 Stainless construction, same high quality valves as used in our battle tested Race Headers. Reduce weight through the elimination of side mufflers, reduce heat on the rear tires and under the decklid, no Drone, and 100% Lifetime Guarantee, including track use. Technical...

At Dundon, we test our products endlessly to ensure the utmost quality. And over time, we found the factory muffler couldn’t keep up with the added performance our Headers provide. We set out to fix that. The result — Dundon’s GT3 Lifetime Center Muffler....