This video of Pagani Huayra has been shot at the Adria International Raceway by the famous Youtubist Marchettino. They have been down there to shoot an official promo video, but this one is just four and a bit minutes of pure exhaust noise coming from an AMG V12 through four nicely arranged tailpipes. Be warned that your ears might bleed after watching this! We just love the it growls at upshifts. What a magnificent machine. [Props to Youtube.com/Marchettino]