obviously, the NOVITEC ROSSO crew weren’t going to leave performance stock. Power output of the 4.5-liter eight-cylinder engine has been raised to
636hp at 9,250 rpm while peak torque jumps to 572Nm at 5,550 rpm. It also has a fancy exhaust system consisting of two high-performance manifolds, sport catalysts and a rear muffler. The same material used for the exhaust systems in Formula 1 racing, called INCONEL, has been utilised which is extremely heat-resistant, seven kilograms lighter than the standard exhaust and, we are guessing, very very expensive.
http://www.youtube.com/watch?v=_lyYmd6edJQ#t=86