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.

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!

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

We've been searching for a quality close ratio gear set for the GT4 and found it in Holinger, the manufacturer of gears for Porsche Racing! No modifications to the gear box, direct fit, splined synchros (no more 3rd gear failures) and lower ratios to...

Great for track cars as we can build a custom map for the shocks for each track you go to, no more fiddling with knobs or trying various settings only to end up frustrated.  We can log the cars performance and make changes to...

We’re proud to offer the strongest, safest, best designed 981 and 718 / GT4 Porsche Cayman bolt in roll bar on the market. We design all our bars with safety as the first concern. Don’t fall for the less expensive bars on the market....

Dundon Sub-Belt Mount Set - For 981/991/718/992 Bucket Seats Enables the use of 6-point harnesses by providing an attachment point for the sub-belts.

Keep your harnesses rolled up nice and neat. Our Harness Reels are available in 1.5" (typical aftermarket bar size) and 41mm (typically Porsche Club Sport bar size). All are anodized black

Dundon Windshield Banner! Show your love for your favorite Porsche Performance Parts!

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...

Dundon 981 Race Headers provide substantial gains in torque and horsepower throughout the rev range. They are a race system so are for track or off-road use.

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...

The dive planes for the Porsche 718 GT4 were specifically designed to increase front-end downforce, increase the high-pressure airflow to the factory intake duct, and to keep drag increase minimal.  They produce a safe aero balance with or without the addition of our rear...