You may not give two honks about the Indianapolis 500, but if you’ve ever driven a car, the race has made you safer, faster, and more efficient. Motorsports have always played a crucial role in advancing automotive engineering, and as one of the world’s most important and longest-running races, the Indy 500 has done more than most. Over a century’s-worth of racing, the famed oval has seen the debut of some crazy ideas that have become so standard that you’ll have a hard time picturing your car without them, from the rearview mirror to the turbocharger.