Polyphony Digital has also been involved in real life automotive projects. They have developed special versions of their "Gran Turismo" games for many car manufacturers as demonstrators for their cars. Nissan also commissioned them to design a special bodykit for their 350Z coupe, which first appeared in 'GT Concept: 2002 Tokyo – Geneva' as the "Nissan 350Z Gran Turismo Aero", later becoming the "Fairlady Z NISMO S-Tune Concept by GRAN TURISMO" in "GT4". There was also a faster 'Z-Tune' version with minor styling revisions and 400PS. The S-Tune was later sold in real life by NISMO (NISSAN MOTORSPORT) as a tuning package for existing owners.