This is the most complete, well-rounded power package around for the 991.2 GT3 4.0L. With careful consideration and many design, engineering and tuning hours, we have extracted impressive power, torque and drive-ability out of the 991.2 GT3 4.0L engine. The best part: no compromises. 

All dyno figures are from a 2018 GT3 manual running 92 Octane pump fuel.

(bottom lines stock, middle line D3 package no tune, top line D3 with Dundon Pro Tune)

You are reading that correctly! MAX gains of 65whp and 64lb-ft of torque!

PEAK output OVER 502 horsepower at the wheels!!!

By reducing the pressure losses in the intake and allowing a more "free flow" into the engine the engine makes power two ways: First, less engine power is used to overcome the parasitic losses of the stock intake tract. Second, we're able to get more high pressure air to the intake valve (to cram in more air into the cylinder). Both of these translate into more power. On a car that uses "Ram-Air" to it's advantage (scoops on the decklid), the gains are more than can be measured on a static dyno. Finally, we utilize Cobb's Accessport to free up the remaining power that the ECU has been holding back. The result? The car drives like an absolute rocket!!  Kit Includes:

• Dundon Dual Cone Airbox
• Dundon Center Plenum with 93mm Throttle Body
• Complete Dundon Exhaust
• Street Headers
• High Flow Cats
• Valves
• Choice of Muffler:
  • Stainless Steel with either Black or Titanium tips (Classic Dundon sound, minimal drone and quite usable)
  • Titanium Ultralight with Loud Inserts (Quieter at low RPM, Zero drone, High-pitch scream at full throttle)
  • Inconel Megaphone Mini Crack Pipe (Full Race car most of the time, valves do a little to take the edge off)
• Cobb Accessport v3 with Dundon ProTune

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 highway.  Combined with our Lifetime Warranty, and coming in at 9lbs fully dressed, this is the most exclusive exhaust in the world!

Ultralight Titanium mufflers are made to order and a 20% restocking fee is charged on cancelled or unused returned parts.

*Note the 992 Ti Muffler needs our street headers to fit on the car 

Add Power and great sound and experience your Porsche’s true capabilities with the Dundon Power Package. Intentionally designed to bring big power with and distinct sound we all love, this kit is perfectly tailored to add more muscle, better sound, and increased performance to your specific GT car. 

+ 47LBFT AND +38WHP! We continue to develop and find power in the 991 NA GT Cars as we love the challenge of finding all the little things the accountants made the engineers back off on at the factory.

The 991.1/991.2 GT3RS was first up, then we did the 991.2 GT3 Touring, Now the 991.2 GT3 (tested a pdk, applies to manuals as well). Next will be the 991.1 GT3 (as soon as the customer can get his car out of his garage due to torn up driveway...).

Results from a 991.2 GT3 PDK car. *from our testing a manual reads about ~10whp higher as there is less parasitic losses in the manual trans than the PDK. We'll work on getting a Winged Manual car to test, anyone in the NW interested contact us!


 

Reran the numbers and 47lbft gains max and 38whp gains max with 475whp peak power!60-130 of a Customers 991.2 GT3 Stock

60-130 of a customers car after the performance package

Proven performance you can feel!

By reducing the pressure losses in the intake and allowing a more "free flow" into the engine the engine makes power two ways. First less engine power is used overcoming the parasitic losses of the stock intake tract. And Second we're able to get more high pressure air to the intake valve to cram in more air into the cylinder. Both of these translate into more power and on a car that uses Ram air to it's advantage (scoops on the decklid), the gains are more than can be measured on a static dyno.

 

Add Power and great sound and experience your Porsche’s true capabilities with the Dundon Power Package. Intentionally designed to bring big power with and distinct sound we all love, this kit is perfectly tailored to add more muscle, better sound, and increased performance to your specific GT car. 

Dundon Motorsports' 991 street header exhaust system is the elegant solution you have been waiting for!

This system features stainless steel construction that will withstand the most extreme conditions on the street or the track, while saving weight compared to the OE system. 

Tuned length primaries lead to a high quality catalyst with minimal pressure drop, then onto a valved secondary that retains the function of the PSE button. No check engine lights, and no tune required!

Dundon Street Headers on a 991 GT3 makes 434whp peak, 30whp at 8215 rpm, 26lbft and 23whp gains at 4586 rpm.

Like all of our exhausts, this product includes a lifetime warranty, a 30 day money back guarantee, and is made in the USA

*Muffler shown is not included with the system, only to see how the system mates to an OE RS Ti muffler

Add Power and great sound and experience your Porsche’s true capabilities with the Dundon Power Package. Intentionally designed to bring big power with and distinct sound we all love, this kit is perfectly tailored to add more muscle, better sound, and increased performance to your specific GT car. 

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 highway.  Combined with our Lifetime Warranty, and coming in at 9lbs fully dressed, this is the most exclusive exhaust in the world!

Ultralight Titanium mufflers are made to order and a 20% restocking fee is charged on cancelled or unused returned parts.

*Note the 992 Ti Muffler needs our street headers to fit on the car 

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. 

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. 

Reduce lift in the front of your 991.2 GT3 and GT3RS and aid in turn in grip!  These Dual Dive Planes were designed with Computational Fluid Dynamics to aid in shape in placement and are part of our complete Aerodynamic upgrade package for the 991.2 GT3 and GT3RS.

We were never happy with the "paste on" wind deflectors and the other styles with plastic "guts" that just either strip out the screw hole and fly off, or debond and fly off.  

So we made the ultimate wind deflector for 718/981/991 cars.  CNC machined inner frame, pre preg Carbon outer deflector.  It's the ultimate!

These "Cup" End Fences are a direct bolt-on to your existing Dundon Valkyrie Splitter and improve efficiency and increase downforce. 

Not ideal for street use, as they extend further out than the standard end fences.