Recently, I've been considering the idea of a 2011 Mercedes-Benz S65 AMG with the 2012 Pagani Huayra's start up and exhaust note. I know they share the same engine (that being a 6.0L V12 Biturbo), though the Huayra has a rear engine setup and the piping is not the same. Is there even a slight possibility for a sedan, that harnesses the same engine as the Huayra, to have the similar notes (or what could come close to something of that noise)? Should the replacing of the catalyst converter, piping, and everything else be replaced and custom fitted in order to have this dream come true? I would really like to know, as I'm considering to opt for a S65 AMG in the near or later future. Any optimistic-related comments are greatly appreciated!