ST. LOUIS, Mo. — Arizona Sport Shirts has signed on to become the title sponsor of the Gateway Dirt Nationals.

The event, held inside the Dome at America’s Center and features dirt late models, modifieds and midgets, will be known as the Arizona Sport Shirts Gateway Dirt Nationals presented by O’Reilly Auto Parts.

Arizona Sports Shirts has signed a three-year agreement to serve as the event’s title sponsor.

“I am very proud because I have had such a long working relationship with both of these companies and brands and the fact that they have taken on a bigger role I think says a lot about our relationship and our commitment to each other in the sport of dirt track racing,” said Cody Sommer, the event’s promoter.  “Any time you have partners grow year after year with you it says a lot about what you are doing for them and what value they see in what you are doing, so that makes this extra special.”

The fourth annual Arizona Sport Shirts Gateway Dirt Nationals presented by O’Reilly Auto Parts takes place Dec. 19-21 inside the Dome at America’s Center.