Time to put down your torque wrench and pull out your wallet or credit card and drink some lemonade. Guess your total laps, tell us your car #, whether or not you're Over or Under Two Litres displacement (we don't care about turbos, superchargers, leaf blowers, and we don't give a Wankel, either). $20 enters your into the Invitational, and any other donation you'd like to make (cough, cough, $100 Get Out of Jail/Penalty Box Free cards) helps us kick childhood cancers to the curbing.