Dundon 981 GT4 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. Race Headers are for Non USA or racing vehicles in the US. All Dundon headers are...

Our GT3 Muffler Adapter kit comes with everything you need to mount a GT3 muffler on your 981 except the muffler and tips! Improve the sound and performance of your 981 Boxster or Cayman with our GT3-style muffler adapter. In stock form, the 981...

Need to dial it back a little bit? Get a meatball flag at your last track day? Our Quiet Tips take the edge off for the sound meter, but not your car's performance! Technical Description With the unique design that doesn’t sacrifice looks, the...

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. All Dundon headers are made with 321SS, the advantages of this are numerous and include, better fitment,...

Pre-owned kit. Inspected and ready to install. Expect light cosmetic wear.Put a GT3 muffler on your 981 Cayman or Boxster. This adapter kit connects a Dundon-compatible GT3 muffler to any 981 chassis car, and it's the same hardware we use in our D4 GT4...

Hardware Kit to Install a 321SS Lifetime Dundon Muffler on 997 and 991 GT3 Cup cars. The 2.5" version also works for 981 GT4/Clubsport cars retrofitting a GT3 muffler using our adapter kit. Kit includes: Flanges (2.5" for stock headers or 3" for Dundon...