"""starting with the 6.0 litre to the current 7.3 litre developed from the engine used in the SL65 AMG.""

I'm not 100% sure about this.  But I am pretty sure the engine is not from the SL65, which uses twin turbos.  I believe the engine is the same as in a 2002 S600.  The older, non-turbo V12s.  I believe they bored it out and kept in normally aspirated on all Pagani Models."