ONLY FOR 991.1 GT3RS with our Swan Neck Rear Wing. Adding this to a car with stock rear wing will make the car unstable due to too much front downforce. Add much needed front downforce to your GT3RS. Designed to complement the 991 GT3RS Swan Neck Wing...

If you want to go faster on street and on track, then: Double the Downforce of the Stock 991.1 GT3RS. Make the air do your bidding and improve the aerodynamic performance of your GT3RS.*991.2 GT3RS pictured, get a free Dundon Swag Package for professional...

Our Carbon Splitter adds the front downforce needed to really take advantage of the Valkyrie Swan Neck Rear Wing. Is possible to pair with a stock Cup wing, but will be very "pointy" and only recommended for use with Cup wing at maximum Angle...

These "Cup" End Fences are a direct bolt-on to your existing Dundon Valkyrie Splitter and improve efficiency and increase downforce.    Not ideal for street use, as they extend further out than the standard end fences.

We were never happy with the "paste on" wind deflectors and the other styles with plastic "guts" that just either strip out the screw hole and fly off, or debond and fly off.  So we made the ultimate wind deflector for 718/981/991 cars.  CNC machined...