I have friends who are mechanics and I have heard them use the phrase street car or street-legal car to distinguish a vehicle that is still legal to drive on the streets (lights, license plates, catalytic converter, muffler, etc still in place) from one that has been so heavily modified that it can only be used on race tracks. But I don't think it is an entity like a steetcar in the "named desire" sense. It is simply a descriptive term. No one would say "I'm going to go get in my street car."