No guts, as the saying goes, no glory. Baltimore’s cheekiest competition, the infamous Hampden Toilet Bowl Races, is set to return Sept. 14, ending a yearslong hiatus for the street race. The races last occurred in 2019. Participants and their porcelain thrones will convene Saturday at 1700 W. 41st St., Suite 420, near UNION Craft Brewing to climb atop their homemade commodes-on-wheels and whiz to the finish line.