With the automotive club's Leopon Team and tank drink scene, Girls und Panzer certainly opened the door for a crossover with car customizing fans. And fans have walked through.
The Yuugai circle have made a replica Panzer IV gear shift knob. A limited allocation for Comic Zin sold out for 10,290yen each, but fans are able to commission more. The aluminum part, with black anodized finish, weighs about 250g and be installed in Japanese cars with various degrees of effort and conversion adapters.
via AkibaBlog (NSFW)