What do you do if you own one of the 25 examples of the Koenigsegg Agera RS, but you’re enamored of the Koenigsegg One:1 aero? An Agera owner who faced that very quandary contacted the Swedish supercar maker in the latter part of 2019, and before very long had embarked on a comprehensive customization job that created a very singular car.

The Koenigsegg team swapped out the hood of the Agera for the One:1 component—which is inset with hood vents—but that was only the beginning of what became a list of modifications. To follow, the Agera received wind-channeling carbon-fiber winglets in front, a new, electronically adjustable rear wing, and a new rear engine cover that sports the One:1’s scoop.

Additional alterations include changes to the cockpit, most notably the addition of the Koenigsegg Regera’s SmartCluster digital gauge array. Finally, the car’s cosmetics got a brush-up that increased its visual drama, with black trim throughout the exterior.