The design of the helmet case is based on the legendary green/yellow Porsche GT3 R from Manthey. Because of its conspicuous transfer image, this is also known to Nürburgring long-distance fans as the "Grello" – a word coined from "Green" and "Yellow".

To reflect the look of the "Grello" helmet, this case is painted yellow with green arrows. It features foil side windows and triangular windows. The Porsche Crest, the Manthey logo and the “PORSCHE” and “Grello” logos are also affixed to the case. Retrofitting details such as tailpipe covers, an engine compartment cover, side air intakes and NACA openings complete the look in the style of a Porsche GT vehicle. A particular highlight is the twist lock, which is based on the central lock system on Porsche wheels. With the handle attached on the back, the helmet case can be easily transported.

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