The program is called the KS5-S and it boost the M5’s 4.4-liter V8 to 600 hp. That’s around 40 bhp on top. Because of that, the top speed is now 330 km/h but one would not have to reach such extremes to notice the additional power. The Kelleners Sport valve-controlled stainless-steel rear silencers with four 90 mm diameter tailpipes will make sure you get the point as soon as you turn the key.
On the outside, the mirror-caps have been given a carbon fiber makeover. That is also true for the Kellener rear spoiler and diffuser. The front lip spoiler and side mouldings complete the custom aerodynamic kit. (more…)