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.

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...

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...

Dundon Street (Catted) tuned length headers and valved side delete exhaust system for the 991.1 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...

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...

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...