991.1 GT3RS Products

Less weight, more power, great sound, no drone, and no CEL. This is the Dundon Long Tube Street Header Exhaust. 

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. 

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 

Take your Titanium Ultralight muffler up a notch with this Inconel 625 Loud Insert.

By eliminating the first expansion on the lower muffler tube, you create an even more visceral experience when the valves open and even quieter upper path when the valves close.

Sold as a pair

Hardware Kit to Install a 321SS Lifetime Dundon Muffler on 997 and 991 GT3/RS cars. 

To go faster on track you need to corner faster, brake quicker and be able to put the power down more efficiently. This is why efficient aerodynamics are key. You will have more confidence, have more fun on track and set faster lap times effortlessly.

Reduce lift in the front of your 991.1 GT3 or 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 991.1 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!

Add major downforce and performance with our 991.1 GT3RS carbon swan neck wing and carbon dual dive planes. This package gives big downforce and major confidence to the already formidable 991.1 GT3RS!   (yes we know a 991.2 GT3RS is pictured, but you get the idea...)

The 93mm Throttle Body has 28.6% more area than the 82mm throttle body, while the Dual Reverse Cone Air Filter box adds 380% more filter area to reduce pressure drop and Increase Horsepower!

Clone - an exact copy of the original. In our case we're talking about taking the fear and anxiety out of having a tune on your GT car and extracting and tailoring the ecu to take the most advantage of your modifications in a safe and professional way!

The Accessport V3 is the world’s best ECU tuning solution for Porsche. The simple DIY plug and play connection to the car’s engine management system via the OBDII port allows for any GT3 owner to apply improved engine and PDK calibrations to their favorite track weapon in a matter of minutes. Each Accessport comes with a collection of Off-The-Shelf maps for the engine computer as well as an optional upgrade for PDK tuning where applicable that combine to improve horsepower, torque, and transmission response and timing along with a list of unique custom features that will make you wonder how you lived without them before.

Replacement air filters (pair) for use with Dundon Dual Reverse Cone Airbox for 991 GT3RS cars.

*filters only

Lightweight, strong, easy to install and adjust, our Titanium Tie Rod ends take your Porsche's handling and steering feel to the next level!

Why do you need adjustable sway bar end links? To ensure perfect corner-balance and zero pre-load on your sway bars with Dundon Motorsports' NEW adjustable sway bar end link set (front & rear).

When your 991 GT3 or GT3RS is corner-balanced or even just sit in it to drive on track, it will put pre-load on the sway bar because the stock end links are not adjustable. This adds additional spring load to one corner of the car, creating an imbalance from left to right. Our adjustable anti roll bar end links ensure there is no pre-load on the sway bar, and that your car is predictable and friendly on the road and the track! 

Works with Weissach Package and Non-Weissach Package 991.2 GT3RS!

Want to dial in the perfect alignment for your 991 GT3 or GT3RS? Dundon Motorsports' shim kit is what you need. All the sizes you want to get your settings perfected.

Get the extra camber you're looking for 1-1.5* more just from the camber plates.

Work with stock dampers and our MCS dampers

Fits ALL 991 GT3/GT3RS Models
Fits ALL 981/718 Spyder/GT4/GT4RS Models
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Features: machined aluminum plates, 10.9 grade pressed-in studs, high quality monoball bearing, enhanced camber built-in (offers more camber than Cup/RS mounts).

Set your GT3RS up for success on your favorite mountain back road or track session with Dundon's Track Day Setup Packages. Achieve amazing steering feel, balance, and tire wear with these carefully designed and curated parts! 

Complete replacement rear lower inner control arms for your 991 GT3 or GT3RS . Remove rubber from the rear suspension for better feel, less slop, and more grip!