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.

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 Reverse 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

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!

For a long time you had to sacrifice your street drivability if you wanted to upgrade to a motorsports damper. No longer! Our Dundon-spec MCS 3-Way dampers improve your GT3'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.

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 Camber Plates (upper mounts)

New Front-Axle Lift Cups
Reservoir Mounting Kits

PASM Delete Kit

Talk to us about adding a Dundon Track Day Setup Package to complete your suspension overhaul!

The star of Forgeline's Motorsport series, the GS1R is a forged, monoblock wheel built to survive the highest levels of motorsport. 

These wheels are made to order and as such can be customized for your needs.

Available in sizes from 17" to 21" and widths from 8.5" to 13", with 40+ color options we can build a set just for you.

Pricing is listed for the most popular configuration for 991 GT cars: 

19" x 10" front

19" x 12" rear

When running a 19" wheel on a 991 platform, it is recommended to replace the lower control arm bolt with OE Porsche part# 99907353001.

Due to the extremely close tolerance to the stock Porsche brake caliper, it is recommended that you swap to a track-focused kit like the PFC Track Day Kit as to not mar the finish of your stock brakes.

Please reach out to us directly to finalize your sizes and wheel finish when placing an order. Thank you!

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!

Motorsport is a great platform not only to push boundaries but to develop high performance components which can then be applied to mixed use street vehicles. PFC Brakes has been in the braking business for years, supplying many manufacturers including Porsche with brake packages for GT3 R, GT3 Cup and GT4 Cayman Clubsport programs. 

The intention behind the Track Day Package for Porsche applications is to offer the best in braking technology and performance to those who are looking to upgrade their Porsche. These braking system utilize technology derived from  Porsche GT3 Cup race cars. These are bolt-on systems specifically for the road going GT3, GT3 RS and GT2 RS cars as well as GT4, Turbo and Carrera platforms. (992, 991, 981, 718, 997, 996) 

PRODUCT FEATURES

• Forged Monobloc Calipers featuring PFC Zero Drag Technology

• Proprietary metallurgy specified designed for high strength and stiffness at elevated temperatures
• Nickel Plated 6-Piston and 4-piston Calipers
• Ventilated titanium piston caps for reduced heat transfer from pad to caliper

• PFC V3 Disks with Zero Failure Technology

• Unique Rotor and Hat interface, eliminating most hardware. The elimination of hardware reduces weight, complexity, and installation time PFC metallurgy specified for high thermal stability and mechanical strength
• 48 vane geometry engineered for increased air flow
• Patented slot pattern for increased initial bit and pad surface conditioning
• Lightweight forged hard anodized aluminum hat

• PFC CarbonMetallic Brake Pads

• Low compressibility
• High modulation
• Fade resistant
• Meet and exceed all copper free initiatives

The track day packages for Porsche applications come in two configurations and offer the following benefits: 

• The 405 Sport+ package with 405mm (15.6”) diameter front discs for 19 or 20” wheels (Replacement for iron or PCCB brakes)
• The 380 Sport package with 380mm (15.0”) front discs for 18” wheels (Replacement for iron or PCCB brakes)

• Both packages are equipped with 380mm (15.0”) rear discs, which retain OE parking brake functionality.
• Calipers are engineered to be direct replacement for Porsche street vehicles. Wheel fitment verification required. May not fit all OE wheels. Customer responsible for clearance verification. 
• PFC’s new track day packages are balanced to work with standard OE ABS, traction control, and Porsche Stability Management
• Both packages are designed to fit both, the Porsche Street center lock or standard wheel studs
• High performance street (PFC 64) or race (PFC 11) compounds are available to accommodate the needs of different driving styles and usage profiles

• Saves 27+ lbs over stock steel brakes, only +10lb more than PCCB
• Includes calipers, rotors, pads & hardware for front and rear axle. Everything you need!

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. 

PDK sees a max improvement of 47 lbft of torque and 38 whp

Manual sees a max improvement of 53 lbft of torque and 31 whp

PEAK output OVER 473 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 Reverse 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)

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 be
• no drone
• lifetime structural warranty
• 100% 30day money back guarantee

• if you try it and don't like it, send it back we'll give you your money back!

We use 321SS (a superior grade of Stainless steel to the cheaper 304SS) and use a metal core spiral wound 200CPSI catalytic converter. All our products are mfg in the USA in our shop in Gig Harbor, WA.

By routing the primaries up and positioning the catalytic converter more vertical we were able to retain 99% of the primary length of the race system. This is how we are able to achieve 25whp gains on the 991.2 GT3.

The Dundon Street Headers on 991.2 GT3

477 whp Peak 

20-25whp gains at 8200-8500 rpm

40lbft-46lbft gains at 3000-5000 rpm

You get everything you love about the Dundon Race Headers, 321 SS construction, industry leading power, lifetime structural warranty, and 100% money back guarantee, if you try it and don't like it, send it back we'll give you your money back! To that end, see the dyno below!

991.2 GT3 Dundon Street (Catted) 477whp peak 

Some pics installed on the car, the street headers are only about 0.5" shorter than our race headers. To fit everything we had to go up into the wheel well where the side mufflers sit. Only way to get the length required for real power gains...  

Dundon 991 GT3/RS showing length of primaries and routing required to fit the cat

As you can see to get the length we wanted we had to go up, anything that can bolt up to the stock location is leaving power on the table...  

Take a listen to it here!

Dundon 991.2 GT3 and GT3RS Street Header-Loud Muffler Sound Check

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 be
• no drone
• lifetime structural warranty
• 100% 30day money back guarantee

• if you try it and don't like it, send it back we'll give you your money back!

We use 321SS (a superior grade of Stainless steel to the cheaper 304SS) and use a metal core spiral wound 200CPSI catalytic converter. All our products are mfg in the USA in our shop in Gig Harbor, WA.

By routing the primaries up and positioning the catalytic converter more vertical we were able to retain 99% of the primary length of the race system. This is how we are able to achieve 25whp gains on the 991.2 GT3.

The Dundon Street Headers on 991.2 GT3

477 whp Peak 

20-25whp gains at 8200-8500 rpm

40lbft-46lbft gains at 3000-5000 rpm

You get everything you love about the Dundon Race Headers, 321 SS construction, industry leading power, lifetime structural warranty, and 100% money back guarantee, if you try it and don't like it, send it back we'll give you your money back! To that end, see the dyno below!

991.2 GT3 Dundon Street (Catted) 477whp peak 

Some pics installed on the car, the street headers are only about 0.5" shorter than our race headers. To fit everything we had to go up into the wheel well where the side mufflers sit. Only way to get the length required for real power gains...  

Dundon 991 GT3/RS showing length of primaries and routing required to fit the cat

As you can see to get the length we wanted we had to go up, anything that can bolt up to the stock location is leaving power on the table...  

Take a listen to it here!

Dundon 991.2 GT3 and GT3RS Street Header-Loud Muffler Sound Check

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.

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.

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.