BRABUS G V12 Biturbo is built by hand, based on the latest Mercedes G-Class. The BRABUS SV12 S engine is based on the V12 Biturbo engine from the latest Mercedes S 600. Before being implanted in the engine bay of the G-Class, displacement of the three-valve engine is increased from 5.5 to 6.3 liters (336 to 384 cubic inches) using a special crankshaft with longer stroke, larger cylinders and larger bore. In addition, the cylinder heads are re-machined and fitted with special camshafts. The engine peripherals were upgraded with larger turbochargers, an optimized intercooling system and a stainless-steel high-performance exhaust system with free-flow metal catalysts. The exahust was custom-developed for the G-Class and features dual chrome-plated tailpipes that exit in front of the rear wheels on the left and right side. New precision mapping for the engine electronics coordinate the perfect interaction of all new components. The results are an exemplary smooth-running engine and maximum power yield while meeting the strict limits set by the EURO IV emission norm.

In short, you have got a Mercedes that is capable of doing a 0-62 Miles Per Hour in 4.2 seconds. The price of BRABUS G V12 Biturbo starts at a price of $500,000.

[Jalopnik]