MID AMERICA 1/24 GRC BRASS 4" WB RTR - Muscle Body: The Great Racing Chassis makes it easy to be competitive and have fun racing. They feature adjustable square rear bushings to adjust your ride height and wheelbase. The brass chassis are designed to mount Lexan or Hard Plastic Model Bodies using removable Velcro strips. Features #611 30K RPM Motor. Bodies are painted in various colors.