When you enter the track one of the first things you'll have to do is complete a technical inspection of your car by a track official. Some tracks are more critical than others due to their sanctioning body agreements. Don't think the track official is picking on you. His sole job is to ensure your ride is safe to go down the track. The last thing officials want is for you or someone else to get hurt. If there's a problem, it'll be noted on your tech card so you can fix it before you're allowed to race. Typical no-no's are only a single throttle return spring, broken or missing wheel studs, no coolant recovery tank, and so forth. If you're running hub caps or steel wheels with trim rings, they'll most likely ask you to remove them. Grab an NHRA rule book to see what you should be concerned with.