This isn't just a slight aesthetic tweak -- it's practically a whole new Pagani.
The BC stands for Benny Caiola, the first customer to buy a Pagani vehicle.
Pagani's main focal points when creating the BC were boosting lightness, maintaining comfort without sacrificing performance and developing a better transmission.
Under the rear bodywork rests a twin-turbocharged, 12-cylinder engine.
That engine kicks out 789 horsepower, about 60 hp more than the standard Huayra.
Its all-new transmission is a seven-speed automated manual, which Pagani promises will cut down on shift times without making the car uncomfortable.
The transmission is said to be 40 percent lighter than a comparable dual-clutch transmission.
There's also a new electronic rear differential to keep all that power from overwhelming the grip at every corner.
A unique aluminum alloy drops the suspension's weight by 25 percent over the standard Huayra.
The brakes are carbon-ceramic units, which resist fade during heavy use.
Pagani promises the Huayra BC will achieve a peak lateral acceleration of 2 g's.
The interior still looks like something out of a steampunk fantasy novel.
Hope you like carbon fiber and Alcantara leather, because those are the dominating materials inside the Huayra BC.
Pagani's exposed shift linkage returns in the BC, as well.
You won't find another car with a shifter like this.
And, naturally, the key remains a miniaturized version of the car itself.
The stability-control system has a new Track mode, in addition to Comfort and Sport.
In fact, you'd be hard-pressed to find many similarities with the regular Huayra.
Even the tires are lighter than before -- a new structure promises a weight loss of 3 percent.
With the exception of the roof, the Huayra and the BC share zero body panels.
The Huayra BC costs 2.3 million euros (about $2.5 million, £1.8 million or AU$3.6 million) and all 20 copies are already sold out, but the car is both Euro6 and CARB compliant, so you could theoretically buy one in the US when it goes on sale.