Nintendo partnered up with West Coast Customs to build full-size Mario Karts for the 2011 LA Autoshow:
"West Coast Customs is known for TV shows such as the classic Pimp My Ride on MTV and the current show Inside West Coast Customs on the Velocity Network. The company has re-created two vehicles from Mario Kart 7: the classic Mario Standard kart, complete with glider attachment for soaring through the air, and the Luigi Bumble V kart, which resembles a bumblebee and features a rear propeller for underwater navigation."