Dundon Motorsports GT4 Race Headers - 981


Designed to fit:

  • 2012 - 2016 Porsche Cayman GT4 (981)

Product Details

Dundon 981 Cayman GT4/Boxster Spyder Race Headers provide substantial gains in torque and horsepower throughout the rev range.  They are a race system so are for track or offroad use.  All Dundon headers are made with 321SS, the advantages of this are numerous and include, better fitment, higher heat tolerance, superior resistance to exhaust gas corrosion and a lifetime structural warranty to the original purchaser. 

The headers attach to the factory PSE muffler and are quiet with no drone at cruise, but put your foot down and they're all kinds of flat six glory.

Dundon Headers are specifically designed for each vehicle and engine.  Unlike our competition that uses a one size fits all, we tailor each system to the unique needs of each engine.

Dyno showing Stock GT4 vs Dundon GT4/Spyder Race Headers, no tune.

Dundon Motorsports 981 GT4 Race Headers (Dyno) - Flat 6 Motorsports

Gains Over Stock:
3600 RPM: +42 wtq
5000 RPM: +36 wtq, +34whp
5800 RPM: +15 wtq, +16whp
6500 RPM: +28whp
7000 RPM: +30whp
7500 RPM: +41whp

Our dyno read the stock car at 330.8 whp at 7400, Porsche rates the car at 385bhp at 7400, this is 14.1% loss with our Dynapack 4000 hub dyno running the car in Rolling Road mode using the factory PIWIS tools.

Dundon Race Header equipped GT4 is now at: 426BHP



About Dundon Motorsports

Dundon Motorsports Logo - Flat 6 Motorsports

Dundon Motorsports provides first-in-class components and materials for your race, track, or street car. 

Dundon Motorsports was born out of three car-enthusiast’s passion to offer the very best of everything to the motorsports world.  The best parts.  The best performance.  The best service.  All in a fun and welcoming environment.  

As not only shop owners, but also fellow car enthusiasts, we understand the time and investment you’ve put into your performance vehicle.  We want to be your partner in that exciting adventure – from simple maintenance to helping you build that dream engine (or car).  We consider it an honor and privilege to walk alongside you in that journey.  When you work with Dundon, you’re not just receiving the best care for your performance vehicle, you’re joining the Dundon family.