(Trent Nelson | The Salt Lake Tribune) Nick Peck, at right, shows the "hop" capabilities of Freddy Alvarez's 1982 Buick Regal at the Gallivan Center in downtown Salt Lake City on Tuesday, Sept. 10, 2019. Lowriders, like Alvarez's Regal, will join the line-up of the Urban Arts Festival, Sept. 21-22.