Germany's GeigerCars has created a customized version of the Ford Mustang it calls the GT 520. Displacement was increased from 4.6 to 5.2 liters, and the engine was extensively reworked. Precision-machining of both cylinder heads, installing sport camshafts and reinforcing the valvetrain are part of the GeigerCars power treatment as is a belt-driven supercharger with generously dimensioned intercooler. A fully stainless-steel high-performance sport exhaust system with high-performance manifold and metal catalysts round out the engine conversion. The sprint from 0 - 62 mph takes just 4.2 seconds. The interior of the show car is hardly recognizable as belonging to a Ford Mustang: The exclusive fully leather black interior features highly contoured sport seats for improved lateral support, and, most of all, a multimedia sound system from JBL that was custom-tailored acoustically and visually to the interior of the Ford Mustang coupe. As expected, brakes are upgraded for increased stopping power and custom wheels are fitted for a custom look.