Pagani is putting the final touches on the Huayra R, an extreme variant of its hypercar that will be officially presented on November 12.

Confirmed by Horacio Pagani a couple of weeks ago, the Huayra R will use a “new aspirated engine” made specifically for it, according to the company’s founder, who chose to not disclose any more details.

Nonetheless, the SuperCarBlog claims to have spoken to insiders with knowledge of the project, who told them that the power unit will indeed be a naturally aspirated V12 built by Mercedes-AMG in collaboration with HWA. The latter is partially responsible for the crazy Apollo IE, whose Ferrari-sourced, naturally aspirated 6.3-liter V8 puts out 780 HP and 561 lb-ft (760 Nm) of torque.

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As for the naturally aspirated V12 powering the Huayra R, whose displacement is unknown, it is said that it kicks out in excess of 900 HP and can rev to over 9,500 rpm. Furthermore, this engine allegedly generates a “diabolic” soundtrack.

Considering that it shares the same suffix, the Huayra R is believed to follow in the footsteps of the Zonda R, which came out in 2009 and was built in 15 units. The Zonda R was a track-only supercar with a Mercedes CLK-GTR-sourced 6.0-liter V12 that put out 740 HP and 524 lb-ft (710 Nm).

The Huayra R might be limited to track use as well, featuring, in addition to the rumored V12, a bold aerodynamic body kit with a large diffuser, huge rear wing and lots of carbon fiber.

Note: Pagani Huayra Imola pictured below