Hot Wheels Audi 90 Imsa Quattro Mega Blocks Building SetMega Blocks Hot Wheels Audi 90 IMSA GTO Quattro It's a German saloon car. And it changed American sports car racing forever. This is the Audi 90 Quattro IMSA GTO, fully buildable and ready to display. Pop the roof and hood to get up close looks at its detailed interior and engine. Or marvel at its authentically designed silhouette. Either way, it's one of the most fearsome looking race cars ever built. And now you can add it to your showcase.