Why is prior approval for car substitution required?
While our instructors are quite versatile, some have expressed preferences for or against certain car models. We honor those requests in our assignments, based on the type of car with which you register. Also, run group assignment is based on demonstrated or projected speed, so arriving at the track with a Viper when you registered with a diesel Rabbit can pose scheduling problems. Finally, questions of vehicle eligibility and compliance with our registration requirements are best settled before the event to avoid any possible difficulty when you arrive at the track.