I listen to "Concerto De KA" from the Nissan recording group when Im racing.
If your listening to tunes when your racing, your not really racing. Ive never once listened to music on the track, or the course as it robs power from the engine, and takes away from being 100% dedicated to the moment.
I usulally listen to something mellow, like floyd, hendrix, older NIN (ds or phm), or mabey some tool to ease tensions while staging up to go dodge cones. Its also played at a lower volume as to not distrupt other stagers and so I can still get my last thoughts in as well.
If your talking about street racing.... dunno havent done that in years. If the rare occasion comes along where I actually decide to go with a taunting driver, then it doest matter whats in the head unit now does it

Besides I usually turn it down or off immediately anyway....