HPI Nano-TTR 1989 BMW M3 E30 Ravaglia - Misano Red RTR-X 1:64 (Matchbox Size) (160990). - HPI MTX-400 2.4GHz radio system. - Fully proportional “Real Steer” is back! The nano-TTR is an in-house, custom-built and designed chassis, fully assembled and ready to roll.