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. ...

  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...

The Dundon D4 Package is the culmination of our work on perfecting and guiding the pressure waves into and out of the 3.8L Engine resulting in 72lbft max gains over stock and 100whp at the rev limiter.

The Dundon D4 GT4 Clubsport Package is the culmination of our work on perfecting and guiding the pressure waves into and out of the 3.8L Engine.

Package Includes: Street Headers (w/ cats) Cobb AP w/ Pro Tune 997 GT3 Intake Manifold w/ 93mm Throttle Body   The Dundon Street headers by itself give a huge improvement to performance and the overall sound of the system, combined with the Cobb AP...

38lbft and 50whp gains (with Race Headers) Includes: Street Headers OEM Touring Airbox 93mm TB/Center Plenum Optional Lifetime Muffler   Only Race Header/Lifetime Muffler/ Touring Airbox/ 93mm Center Plenum Dyno available.

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. ...

Package Includes: Street Headers (w/ cats) Cobb AP w/ Pro Tune Dundon Resonance Intake Manifold w/ 100mm Throttle Body 997.1 Secondary Air Injection Retrofit (required for 997.2 cars) The Dundon Street headers by itself give a huge improvement to performance and the overall sound...