The Koenigsegg Agera RS is a hypercar that has cemented itself a place in history. Just 25 examples were built, including one for a US customer that went to a closed highway in Nevada in 2017 to set a world production speed record and four other records. Granted, that wasn't a 'base model' Agera RS, as it was equipped with the 1MW package derived from the limited One:1, giving it 1,341 horsepower. Now, nearly three years after production of the RS ended in 2018, Koenigsegg is taking lessons learned from the One:1 and allowing current owners to upgrade their car, as the brand has done for one owner with this, the Agera RS Refinement.

Back in the fall of 2019, the owner of the 2017 model Agera RS approached Koenigsegg and requested his car be upgraded with air vents on the hood inspired by the One:1. The Koenigsegg engineers went one step further, customizing a full range of accessory upgrades with similar styling, resulting in a six-month-long development process to create the Agera RS Refinement. It wasn't just a styling upgrade, though, as many of the aerodynamic elements had to be engineered from start to finish to cope with the performance potential of the Agera RS, meaning each and every element is fully functional.

According to Koenigsegg, the upgrades have resulted in even more impressive performance, but to us, it just shows the brand's dedication to the pursuit of perfection, even after the Agera has been replaced by the Koenigsegg Jesko.

To accommodate the hood vents the owner requested, Koenigsegg had to re-engineer the entire front end, adding new elements for better airflow such as additional canards. Over the top and around back, a rear deck scoop was developed, and throughout the entire project, the chosen finish of black was applied to items like the 3D-printed exhaust and other elements. The top-mounted carbon fiber wing is new, too, replacing the previously spring-actuated version with a software-controlled version. If you think this 2017 Agera RS managed to get away without the interior being revised, think again, as the instrument cluster was swapped out for a new SmartCluster unit identical to the one used in the hybrid Regera hypercar.