Some 140,000 hot-rod enthusiasts roll into Las Vegas for the Specialty Equipment Marketing Association Show (SEMA), the world’s largest automotive aftermarket trade show. It attracts more than 2,500 exhibitors and takes up more than 1 million square feet at the Las Vegas Convention Center, along with 60,000 domestic and international buyers looking for the latest and most innovative products to beef up and customize vehicles. The show is closed to the public, but many vehicles are displayed outside the Convention Center and the parade of cars leaving the show has become a spectator tradition. This year’s SEMA show is scheduled for Nov. 1-4. 3150 Paradise Rd., SEMAShow.com.