Update on WP : there is a light pack where you keep the homolgsted FIA roll cage instead of getting the titanium. Dealer highly advices to keep the homologated one . 

 

About the rims : I think Chris Harris ‘ s don’t have the correct color !!?? 

As the above , they don’t exist is real life ;-)  the light weight ones for the GT3 are more silver looking. 
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 964 Carrera 4 --  997.2 C2S , -20mm --  991 GT3 RS