Here is Bumblebee's Japanese version, the Gojic racer from Esukeipan Japan. It is actually an extension kit which gives the robot the ability into a racing car. What I like is the speed at which it transforms.

The Gogic kit will be available in Japan from November for 34,650 Yen ($ 300) with the add on kit selling for 8400 Yen ($ 72).

Source (Japanese)