The 93mm Throttle Body has 28.6% more area than the 82mm throttle body, while the Dual Reverse Cone Airbox has 380% more Filter area that the flat panel OEM air box. Less pressure drop means more horsepower!

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! Technical Description Help your 991.1 GT3RS BREATHE!!!We found in our exhaust...

Let your 991.2 GT3 breathe. Our full intake kit replaces the restrictive factory airbox and 82mm throttle body with the Dundon Dual Reverse Cone Airbox, Dundon Center Plenum and 93mm throttle body: more air flow, more capacity, and more of that intake sound. In...

Help your 991.1 GT3 BREATHE!!! We found in our exhaust development and testing of the 991.2 GT3 and RS that they are intake limited both through the factory airfilter box and through the 82mm Throttle body. A bit of history. The Bosch 82mm Throttle...

Let your 991.2 GT3 breathe with a larger 93mm Throttle Body and Center Plenum! Scroll down for more details. In testing the 991.2 GT3 and RS we found the air intake to be restrictive. With the addition of the larger 93mm Throttle Body and...

Free up power and add some beauty to your engine bay with the Dundon Motorsports Carbon Fiber Dual Cone Airbox. On a stock car this airbox will free up about 5-7whp. On a Dundon Header equipped car, this airbox is good for about 8-10...

Free up power and add some beauty to your engine bay with the Dundon Motorsports Carbon Fiber Dual Cone Airbox. On a stock car this airbox will free up about 5-7whp. On a Dundon Resonance Intake equipped car, this airbox is good for about...

We based this design on the fabled 997 4.0L GT3RS. It features dual conical air filters from the 4.0RS.On a stock car this airbox will free up about 5-7whp.On a Dundon Race Header equipped car, this airbox is good for about 8-10 whp!Note Fan...

Do you want more power for your Porsche? The Dundon 997 Resonance Intake Manifold is the perfect way to add some extra horsepower to your car. Our intake manifold will increase engine performance and give you a smoother, quicker acceleration. It's also designed with...

Using science and engineering to increase performance is what we do. The Dundon 981/991 3.8L Intake Runners are no exception. Through careful design of the intake runner geometry we were able to add 30+ peak wheel horsepower on top of our already potent race...

Bring your 3.4L Boxster or Cayman to the next level with our Intake Runners. When combined with our race headers and custom tune, you'll see gains of 60+hp and 40+trq at the wheels! Using science and engineering to increase performance is what we do....

Includes: Cobb Accessport and Dundon ProTune. Dundon Motorsports is happy to provide the Cobb Accessport for the 981 GT4/Spyder. We're Cobb Pro Tuners and have developed a great tune for the Dundon GT4/Spyder Race Headers.Gains Over Stock including GT4/Spyder Race Headers and Dundon Pro...

Tune your Porsche with a Cobb AP!   Includes: Cobb Accessport - $1095 (997.1) or $1165 (997.2) Dundon ProTune - $895

Dundon Motorsports is happy to provide the Cobb Accessport for the 981 Cayman S/GTS and Boxster S/GTS 3.4L platform. We are Cobb Pro Tuners and have developed a great tune for the 981 when paired with our Intake Runners and/or our Headers. Includes: Cobb...

Reduce crankshaft harmonics while also increasing power and reliability with our rigorously tested Harmonic Dampers. 997.1 GT3 and RS use the factory belt size (2260) 996 and 997 Turbo must switch to size 2260 997.2 GT3 and RS must switch to size 2260 Belt...

We've been searching for a quality 3rd gear replacement for the GT4 and found it in Holinger, the manufacturer of gears for Porsche Racing! A replacement to the weak and poorly designed factory 3rd gear in the GT4. Synchro dog-rings are splined to the...

A bolt in Dual Cone intake for your 991.1 GT3 and 911R!

 Limited Slip Differential for Porsche G96/G97 and G50 transaxles. Holinger have spent many years supplying Porsche with O.E. sequential gearbox parts and have been involved in officially servicing their racing transmissions. We have become very familiar with the potential weaknesses in the differential area...

Holinger (Drexler) Pro Diff for the 981S and GT4

Replacement Air Filter for Dundon Dual Cone Intake for 991.2 GT3 cars. *Filters Only