The Koenigsegg Agera was launched in 2010 as the company's second nameplate after the CC, which spawned the CCR, CCX, and other limited-edition models. Built until 2013 in just seven units, the Agera received several updates. The Swedish brand launched the Agera R in 2011, the Agera S in 2012, and the One:1 "Megacar" in 2014. The latter is the most powerful Koenigsegg built to date and it also delivers the greatest power-to-weight ratio. However, the Agera saga continued into 2015 with the RS, built in 25 units, and in 2016 with the Agera Final. Although the Final was the last Agera-based supercar, Koenigsegg unveiled a new bespoke supercar at the Monterey Car Week.

Dubbed Agera XS, it's a one-off vehicle with custom features inside and out, as well as the first Agera created specifically for a U.S. customer. Just like the RS it is based on, the XS is an evolution of the One:1 and incorporates much of the technology developed for the "Megacar."

“It is a true pleasure for us to present the Agera XS at this year’s Monterey Car Week, especially as this is the first Agera RS that will be fully homologated for use on American roads. Our re-entry into the U.S. market is a watershed moment for our company and the Agera XS is the perfect car to emphasize this occasion," said Koenigsegg boss Christian von Koenigsegg.

Keep reading to find out more about it and stay tuned for updates.

Updated 08/18/2016: Our guy Jonathan Lopez is present at the 2016 Monterey Car Week and he took a series of shots for the new Koenigsegg Agera XS. Check them out in the picture gallery.

Continue reading to learn more about the Koenigsegg Agera XS.

What makes the Koenigsegg Agera XS special

Styling-wise, the XS appears to be identical to the Agera RS at first glance, but several custom features become visible upon closer inspection. Naturally, the first detail that catches the eye is the flashy new paint. Dubbed Karosserie Orange, it gives the supercar an intense orange finish with what Koenigsegg describes as a "diamond-dust metallic effect." Just like the Agera RS, the XS has a clear carbon center strip and thin black stripes on the sides.

Another feature that sets it apart is the bespoke aerodynamic package, which includes additional canards on the front bumper, a slightly revised front splitter, and a new rear wing. The latter looks similar to the one seen on the One:1 "Megacar," but a bit larger. This makes it the largest rear wing ever fitted to a Koenigsegg.

Other than that, the XS is largely an RS on the outside and includes the same removable lightweight hardtop. The top can be detached and reattached in minutes and is stored on-board, under the front hood of the car.

Inside, the XS is again largely based on the RS, featuring the same sporty cockpit with loads of carbon-fiber and amazing craftsmanship. However, it features more creature comforts and practicality that other Koenigseggs, incorporating adjustable pedals and steering column, six-way electrically adjustable carbon sport seats, Apple CarPlay, USB connection and media player, climate control, digital warning and information system, G sensor, alarm, and a tire monitoring system. Everything that's not clear-coated carbon-fiber is wrapped in black Alcantara with orange contrast stitching to match the exterior.

Under the hood, the XS has the familiar 5.0-liter, twin-turbocharged V-8 engine motivating every Koenigsegg except the Regera. The powerful unit mates to a seven-speed paddle-shift transmission, with the company's in-house developed, integrated E-diff. There's no word as to how much output hits the pavement, but Koenigsegg describes it as "one of the most powerful, fully homologated, street legal production cars on American roads with the best power to weight ratio." Chances are output is identical to the RS, which comes with 1,160 horsepower on tap. This would give the XS a tremendous power-to-weight ratio given that it tips the scales at only 3,075 including all fluids, despite the added comfort features.

The supercar also features carbon-ceramic brakes with Sport ABS, KES (stability control), front and rear hydraulic lifting system, active shock absorbers, and active ride height.

Pricing is obviously a mystery, but given that the Agera RS costs around $2 million, the XS, likely to remain just a one-off, probably brought at least $3 million into the company's coffers.

Koenigsegg Agera R

Read our full review on the Koenigsegg Agera R here.