EXCALIBUR 9507-29-1 NASCAR Kevin Harvick No. 29 Radio Control Car 1:20 Scale. Put yourself in the drivers seat of the cars used by some of the most popular NASCAR drivers. Excaliburs radio-control NASCAR replicas are so authentic, you will feel like you are driving the real thing. Realistic, detailed look, featuring genuine sponsor decals. Real rubber tires and authentic NASCAR racing wheels. Front-wheel steering alignment. This vehicle operates at a frequency of 27 Mhz.