The Tire Rack Ultimate Track Car Challenge presented by Grassroots Motorsports is the ultimate test of driver and machine. No rules. Run what you brung. All track and race cars are eligible no matter the sanctioning body. Our goal: See who has the fastest track car in America via this time trial event.

Why partner with us on this event? This event offers partners the ultimate way to interact with the fast growing race car and track day market in a powerful way. The event regularly attracts cars from top shops plus professional drivers.