C-Pillars as part of the engine air intake
"Our largest challenge," says Klaus Bischoff, "was to supply the six-liter mid-mounted engine enough air without diluting the silhouette of the GTI. Side inlets had to be used and optimized for breathing, and the aerodynamics of the car had to be reworked so that we could achieve sufficient cooling at the rear axle. We did not want to set an enormous tail wing on the car."
In both cases, a trick helped. Bischoff continues: "The strongest Golf design elements are the C-pillars, and it was exactly there that we needed the inlets for the engine air intakes. The C-pillars were redesigned by hand in such a way that we allowed the rear windows to cant slightly inward. So engine air is sucked in through a gap between the window glass and the C-pillar. Cooling is taken car of by an enormous radiator in front as well as by the ducts located in the flares." Each part of the revised bodywork appears at first sight to be a production GTI part, however they have been carefully designed to have increased functionality without sacrificing aesthetics.
Carbon fiber roof is a diffuser
Innovative and thoughtful construction of the bodies prevented the clean lines of the GTI W12-650 from being ruined by a roof-mounted wing. Says Klaus Bischoff: "This GTI moved the wing inward. The roof is part of an enormous diffuser, which provides sufficient down force on the rear axle. It is made of carbon fiber and forces air over and under the tail spoiler to obtain a perfect amount of pressure on the rear axle."
The bumpers of the show car show strong lines and clever design, as well. In the back, enormous exhaust openings mark the car as a GTI W12-650. Two chrome-plated dual pipes frame the exhaust opening in the rear. At the front, a red-line grille draws upon the heritage of the very first Golf GTI produced.