Have you ever been sitting at a stoplight, admiring the gentle purr emanating from your 5.5 Liter V8 Kompressor engine equipped with a Kleemann Stage K3 tuning program, when you thought to yourself:  "610 horsepower is nice, but I wonder if there's any way I could squeeze a little extra brawn out of my already staggering powerplant?"

If you've ever found yourself in this predicament, Danish tuning extraordinaire Kleemann has again upped the ante, now offering customers the option of a 640 horsepower Stage K4 tuning package.

In addition to the plethora of goodies included with the Kleemann Stage K3 kit, a few of which include a bespoke pulley wheel, ECU upgrade, Super Sport camshafts, Kleemann tubular headers and a high flow exhaust system, the Stage K4 kit completes your tuning fantasy by also including a modified inlet house and throttle body.

The result is an increase of in horsepower from 610 to 640 hp, an increase in torque from 835 Nm to 900 Nm, and an increase in Torque lb-ft from 618 to 731.  Beautiful.

If you're interested, the Kleemann Stage K4 tuning package fits on any Mercedes model equipped with the 5.5-Liter Kompressor V8 engine.  For more info and the full list of specs, check out Kleemann's website to learn more.