Police said Deondre Robinson and Patrick Aten were racing each other at "very high speeds" in the 9900 block of South Broadway when the crash happened.
Another cold night is expected with temperatures cold enough for frost across much of the metro area. Temperatures may drop into the upper 20s for some in Illinois.
St. Louis police are ramping up patrols downtown and are prepared for the large crowds coming in for three St. Louis sports teams playing all in one weekend.